Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 3566 insertions, 0 deletions

diff --git a/Source/WebCore/loader/FrameLoader.cpp b/Source/WebCore/loader/FrameLoader.cpp
new file mode 100644
index 0000000..d11399c
--- /dev/null
+++ b/Source/WebCore/loader/FrameLoader.cpp
@@ -0,0 +1,3566 @@
+/*
+ * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
+ * Copyright (C) 2008 Alp Toker <alp@atoker.com>
+ * Copyright (C) Research In Motion Limited 2009. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer. 
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "FrameLoader.h"
+
+#include "ApplicationCacheHost.h"
+#if ENABLE(ARCHIVE) // ANDROID extension: disabled to reduce code size
+#include "Archive.h"
+#include "ArchiveFactory.h"
+#endif
+#include "BackForwardController.h"
+#include "BeforeUnloadEvent.h"
+#include "MemoryCache.h"
+#include "CachedPage.h"
+#include "CachedResourceLoader.h"
+#include "Chrome.h"
+#include "DOMImplementation.h"
+#include "DOMWindow.h"
+#include "Document.h"
+#include "DocumentLoadTiming.h"
+#include "DocumentLoader.h"
+#include "Editor.h"
+#include "EditorClient.h"
+#include "Element.h"
+#include "Event.h"
+#include "EventNames.h"
+#include "FloatRect.h"
+#include "FormState.h"
+#include "FormSubmission.h"
+#include "Frame.h"
+#include "FrameLoadRequest.h"
+#include "FrameLoaderClient.h"
+#include "FrameNetworkingContext.h"
+#include "FrameTree.h"
+#include "FrameView.h"
+#include "HTMLAnchorElement.h"
+#include "HTMLFormElement.h"
+#include "HTMLNames.h"
+#include "HTMLObjectElement.h"
+#include "HTTPParsers.h"
+#include "HistoryItem.h"
+#include "IconDatabase.h"
+#include "IconLoader.h"
+#include "InspectorController.h"
+#include "Logging.h"
+#include "MIMETypeRegistry.h"
+#include "MainResourceLoader.h"
+#include "Page.h"
+#include "PageCache.h"
+#include "PageGroup.h"
+#include "PageTransitionEvent.h"
+#include "PluginData.h"
+#include "PluginDatabase.h"
+#include "PluginDocument.h"
+#include "ProgressTracker.h"
+#include "ResourceHandle.h"
+#include "ResourceRequest.h"
+#include "SchemeRegistry.h"
+#include "ScriptController.h"
+#include "ScriptSourceCode.h"
+#include "SecurityOrigin.h"
+#include "SegmentedString.h"
+#include "SerializedScriptValue.h"
+#include "Settings.h"
+#include "TextResourceDecoder.h"
+#include "WindowFeatures.h"
+#include "XMLDocumentParser.h"
+#include <wtf/CurrentTime.h>
+#include <wtf/StdLibExtras.h>
+#include <wtf/text/CString.h>
+#include <wtf/text/StringConcatenate.h>
+
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+#include "HTMLMediaElement.h"
+#endif
+
+#if ENABLE(SHARED_WORKERS)
+#include "SharedWorkerRepository.h"
+#endif
+
+#if ENABLE(SVG)
+#include "SVGDocument.h"
+#include "SVGLocatable.h"
+#include "SVGNames.h"
+#include "SVGPreserveAspectRatio.h"
+#include "SVGSVGElement.h"
+#include "SVGViewElement.h"
+#include "SVGViewSpec.h"
+#endif
+
+#ifdef ANDROID_INSTRUMENT
+#include "TimeCounter.h"
+#include "RenderArena.h"
+#endif
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+#if ENABLE(SVG)
+using namespace SVGNames;
+#endif
+
+#if ENABLE(XHTMLMP)
+static const char defaultAcceptHeader[] = "application/xml,application/vnd.wap.xhtml+xml,application/xhtml+xml;profile='http://www.wapforum.org/xhtml',text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
+#else
+static const char defaultAcceptHeader[] = "application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
+#endif
+
+static double storedTimeOfLastCompletedLoad;
+
+bool isBackForwardLoadType(FrameLoadType type)
+{
+    switch (type) {
+        case FrameLoadTypeStandard:
+        case FrameLoadTypeReload:
+        case FrameLoadTypeReloadFromOrigin:
+        case FrameLoadTypeSame:
+        case FrameLoadTypeRedirectWithLockedBackForwardList:
+        case FrameLoadTypeReplace:
+            return false;
+        case FrameLoadTypeBack:
+        case FrameLoadTypeBackWMLDeckNotAccessible:
+        case FrameLoadTypeForward:
+        case FrameLoadTypeIndexedBackForward:
+            return true;
+    }
+    ASSERT_NOT_REACHED();
+    return false;
+}
+
+static int numRequests(Document* document)
+{
+    if (!document)
+        return 0;
+    
+    return document->cachedResourceLoader()->requestCount();
+}
+
+// This is not in the FrameLoader class to emphasize that it does not depend on
+// private FrameLoader data, and to avoid increasing the number of public functions
+// with access to private data.  Since only this .cpp file needs it, making it
+// non-member lets us exclude it from the header file, thus keeping FrameLoader.h's
+// API simpler.
+//
+// FIXME: isDocumentSandboxed should eventually replace isSandboxed.
+static bool isDocumentSandboxed(Frame* frame, SandboxFlags mask)
+{
+    return frame->document() && frame->document()->securityOrigin()->isSandboxed(mask);
+}
+
+FrameLoader::FrameLoader(Frame* frame, FrameLoaderClient* client)
+    : m_frame(frame)
+    , m_client(client)
+    , m_policyChecker(frame)
+    , m_history(frame)
+    , m_notifer(frame)
+    , m_writer(frame)
+    , m_subframeLoader(frame)
+    , m_state(FrameStateCommittedPage)
+    , m_loadType(FrameLoadTypeStandard)
+    , m_delegateIsHandlingProvisionalLoadError(false)
+    , m_quickRedirectComing(false)
+    , m_sentRedirectNotification(false)
+    , m_inStopAllLoaders(false)
+    , m_isExecutingJavaScriptFormAction(false)
+    , m_didCallImplicitClose(false)
+    , m_wasUnloadEventEmitted(false)
+    , m_pageDismissalEventBeingDispatched(false)
+    , m_isComplete(false)
+    , m_isLoadingMainResource(false)
+    , m_needsClear(false)
+    , m_checkTimer(this, &FrameLoader::checkTimerFired)
+    , m_shouldCallCheckCompleted(false)
+    , m_shouldCallCheckLoadComplete(false)
+    , m_opener(0)
+    , m_didPerformFirstNavigation(false)
+    , m_loadingFromCachedPage(false)
+    , m_suppressOpenerInNewFrame(false)
+    , m_sandboxFlags(SandboxAll)
+    , m_forcedSandboxFlags(SandboxNone)
+{
+}
+
+FrameLoader::~FrameLoader()
+{
+    setOpener(0);
+
+    HashSet<Frame*>::iterator end = m_openedFrames.end();
+    for (HashSet<Frame*>::iterator it = m_openedFrames.begin(); it != end; ++it)
+        (*it)->loader()->m_opener = 0;
+
+    m_client->frameLoaderDestroyed();
+
+    if (m_networkingContext)
+        m_networkingContext->invalidate();
+}
+
+void FrameLoader::init()
+{
+    // Propagate sandbox attributes to this Frameloader and its descendants.
+    // This needs to be done early, so that an initial document gets correct sandbox flags in its SecurityOrigin.
+    updateSandboxFlags();
+
+    // this somewhat odd set of steps is needed to give the frame an initial empty document
+    m_stateMachine.advanceTo(FrameLoaderStateMachine::CreatingInitialEmptyDocument);
+    setPolicyDocumentLoader(m_client->createDocumentLoader(ResourceRequest(KURL(ParsedURLString, "")), SubstituteData()).get());
+    setProvisionalDocumentLoader(m_policyDocumentLoader.get());
+    setState(FrameStateProvisional);
+    m_provisionalDocumentLoader->setResponse(ResourceResponse(KURL(), "text/html", 0, String(), String()));
+    m_provisionalDocumentLoader->finishedLoading();
+    writer()->begin(KURL(), false);
+    writer()->end();
+    m_frame->document()->cancelParsing();
+    m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocument);
+    m_didCallImplicitClose = true;
+
+    m_networkingContext = m_client->createNetworkingContext();
+}
+
+void FrameLoader::setDefersLoading(bool defers)
+{
+    if (m_documentLoader)
+        m_documentLoader->setDefersLoading(defers);
+    if (m_provisionalDocumentLoader)
+        m_provisionalDocumentLoader->setDefersLoading(defers);
+    if (m_policyDocumentLoader)
+        m_policyDocumentLoader->setDefersLoading(defers);
+
+    if (!defers) {
+        m_frame->navigationScheduler()->startTimer();
+        startCheckCompleteTimer();
+    }
+}
+
+bool FrameLoader::canHandleRequest(const ResourceRequest& request)
+{
+    return m_client->canHandleRequest(request);
+}
+
+void FrameLoader::changeLocation(PassRefPtr<SecurityOrigin> securityOrigin, const KURL& url, const String& referrer, bool lockHistory, bool lockBackForwardList, bool refresh)
+{
+    RefPtr<Frame> protect(m_frame);
+    urlSelected(FrameLoadRequest(securityOrigin, ResourceRequest(url, referrer, refresh ? ReloadIgnoringCacheData : UseProtocolCachePolicy), "_self"),
+        0, lockHistory, lockBackForwardList, SendReferrer, ReplaceDocumentIfJavaScriptURL);
+}
+
+void FrameLoader::urlSelected(const KURL& url, const String& passedTarget, PassRefPtr<Event> triggeringEvent, bool lockHistory, bool lockBackForwardList, ReferrerPolicy referrerPolicy)
+{
+    urlSelected(FrameLoadRequest(m_frame->document()->securityOrigin(), ResourceRequest(url), passedTarget),
+        triggeringEvent, lockHistory, lockBackForwardList, referrerPolicy, DoNotReplaceDocumentIfJavaScriptURL);
+}
+
+// The shouldReplaceDocumentIfJavaScriptURL parameter will go away when the FIXME to eliminate the
+// corresponding parameter from ScriptController::executeIfJavaScriptURL() is addressed.
+void FrameLoader::urlSelected(const FrameLoadRequest& passedRequest, PassRefPtr<Event> triggeringEvent, bool lockHistory, bool lockBackForwardList, ReferrerPolicy referrerPolicy, ShouldReplaceDocumentIfJavaScriptURL shouldReplaceDocumentIfJavaScriptURL)
+{
+    ASSERT(!m_suppressOpenerInNewFrame);
+
+    FrameLoadRequest frameRequest(passedRequest);
+
+    if (m_frame->script()->executeIfJavaScriptURL(frameRequest.resourceRequest().url(), shouldReplaceDocumentIfJavaScriptURL))
+        return;
+
+    if (frameRequest.frameName().isEmpty())
+        frameRequest.setFrameName(m_frame->document()->baseTarget());
+
+    if (referrerPolicy == NoReferrer)
+        m_suppressOpenerInNewFrame = true;
+    if (frameRequest.resourceRequest().httpReferrer().isEmpty())
+        frameRequest.resourceRequest().setHTTPReferrer(m_outgoingReferrer);
+    addHTTPOriginIfNeeded(frameRequest.resourceRequest(), outgoingOrigin());
+
+    loadFrameRequest(frameRequest, lockHistory, lockBackForwardList, triggeringEvent, 0, referrerPolicy);
+
+    m_suppressOpenerInNewFrame = false;
+}
+
+void FrameLoader::submitForm(PassRefPtr<FormSubmission> submission)
+{
+    ASSERT(submission->method() == FormSubmission::PostMethod || submission->method() == FormSubmission::GetMethod);
+
+    // FIXME: Find a good spot for these.
+    ASSERT(submission->data());
+    ASSERT(submission->state());
+    ASSERT(submission->state()->sourceFrame() == m_frame);
+    
+    if (!m_frame->page())
+        return;
+    
+    if (submission->action().isEmpty())
+        return;
+
+    if (isDocumentSandboxed(m_frame, SandboxForms))
+        return;
+
+    if (protocolIsJavaScript(submission->action())) {
+        m_isExecutingJavaScriptFormAction = true;
+        m_frame->script()->executeIfJavaScriptURL(submission->action(), DoNotReplaceDocumentIfJavaScriptURL);
+        m_isExecutingJavaScriptFormAction = false;
+        return;
+    }
+
+    Frame* targetFrame = m_frame->tree()->find(submission->target());
+    if (!shouldAllowNavigation(targetFrame))
+        return;
+    if (!targetFrame) {
+        if (!DOMWindow::allowPopUp(m_frame) && !isProcessingUserGesture())
+            return;
+
+        targetFrame = m_frame;
+    } else
+        submission->clearTarget();
+
+    if (!targetFrame->page())
+        return;
+
+    // FIXME: We'd like to remove this altogether and fix the multiple form submission issue another way.
+
+    // We do not want to submit more than one form from the same page, nor do we want to submit a single
+    // form more than once. This flag prevents these from happening; not sure how other browsers prevent this.
+    // The flag is reset in each time we start handle a new mouse or key down event, and
+    // also in setView since this part may get reused for a page from the back/forward cache.
+    // The form multi-submit logic here is only needed when we are submitting a form that affects this frame.
+
+    // FIXME: Frame targeting is only one of the ways the submission could end up doing something other
+    // than replacing this frame's content, so this check is flawed. On the other hand, the check is hardly
+    // needed any more now that we reset m_submittedFormURL on each mouse or key down event.
+
+    if (m_frame->tree()->isDescendantOf(targetFrame)) {
+        if (m_submittedFormURL == submission->action())
+            return;
+        m_submittedFormURL = submission->action();
+    }
+
+    submission->data()->generateFiles(m_frame->document());
+    submission->setReferrer(m_outgoingReferrer);
+    submission->setOrigin(outgoingOrigin());
+
+    targetFrame->navigationScheduler()->scheduleFormSubmission(submission);
+}
+
+void FrameLoader::stopLoading(UnloadEventPolicy unloadEventPolicy, DatabasePolicy databasePolicy)
+{
+    if (m_frame->document() && m_frame->document()->parser())
+        m_frame->document()->parser()->stopParsing();
+
+    if (unloadEventPolicy != UnloadEventPolicyNone) {
+        if (m_frame->document()) {
+            if (m_didCallImplicitClose && !m_wasUnloadEventEmitted) {
+                Node* currentFocusedNode = m_frame->document()->focusedNode();
+                if (currentFocusedNode)
+                    currentFocusedNode->aboutToUnload();
+                m_pageDismissalEventBeingDispatched = true;
+                if (m_frame->domWindow()) {
+                    if (unloadEventPolicy == UnloadEventPolicyUnloadAndPageHide)
+                        m_frame->domWindow()->dispatchEvent(PageTransitionEvent::create(eventNames().pagehideEvent, m_frame->document()->inPageCache()), m_frame->document());
+                    if (!m_frame->document()->inPageCache()) {
+                        RefPtr<Event> unloadEvent(Event::create(eventNames().unloadEvent, false, false));
+                        // The DocumentLoader (and thus its DocumentLoadTiming) might get destroyed
+                        // while dispatching the event, so protect it to prevent writing the end
+                        // time into freed memory.
+                        RefPtr<DocumentLoader> documentLoader = m_provisionalDocumentLoader;
+                        if (documentLoader && !documentLoader->timing()->unloadEventStart && !documentLoader->timing()->unloadEventEnd) {
+                            DocumentLoadTiming* timing = documentLoader->timing();
+                            ASSERT(timing->navigationStart);
+                            m_frame->domWindow()->dispatchTimedEvent(unloadEvent, m_frame->domWindow()->document(), &timing->unloadEventStart, &timing->unloadEventEnd);
+                            ASSERT(timing->unloadEventStart >= timing->navigationStart);
+                        } else
+                            m_frame->domWindow()->dispatchEvent(unloadEvent, m_frame->domWindow()->document());
+                    }
+                }
+                m_pageDismissalEventBeingDispatched = false;
+                if (m_frame->document())
+                    m_frame->document()->updateStyleIfNeeded();
+                m_wasUnloadEventEmitted = true;
+            }
+        }
+
+        // Dispatching the unload event could have made m_frame->document() null.
+        if (m_frame->document() && !m_frame->document()->inPageCache()) {
+            // Don't remove event listeners from a transitional empty document (see bug 28716 for more information).
+            bool keepEventListeners = m_stateMachine.isDisplayingInitialEmptyDocument() && m_provisionalDocumentLoader
+                && m_frame->document()->securityOrigin()->isSecureTransitionTo(m_provisionalDocumentLoader->url());
+
+            if (!keepEventListeners)
+                m_frame->document()->removeAllEventListeners();
+        }
+    }
+
+    m_isComplete = true; // to avoid calling completed() in finishedParsing()
+    m_isLoadingMainResource = false;
+    m_didCallImplicitClose = true; // don't want that one either
+
+    if (m_frame->document() && m_frame->document()->parsing()) {
+        finishedParsing();
+        m_frame->document()->setParsing(false);
+    }
+  
+    m_workingURL = KURL();
+
+    if (Document* doc = m_frame->document()) {
+        // FIXME: HTML5 doesn't tell us to set the state to complete when aborting, but we do anyway to match legacy behavior.
+        // http://www.w3.org/Bugs/Public/show_bug.cgi?id=10537
+        doc->setReadyState(Document::Complete);
+
+        if (CachedResourceLoader* cachedResourceLoader = doc->cachedResourceLoader())
+            cachedResourceLoader->cancelRequests();
+
+#if ENABLE(DATABASE)
+        if (databasePolicy == DatabasePolicyStop)
+            doc->stopDatabases(0);
+#else
+    UNUSED_PARAM(databasePolicy);
+#endif
+    }
+
+    // FIXME: This will cancel redirection timer, which really needs to be restarted when restoring the frame from b/f cache.
+    m_frame->navigationScheduler()->cancel();
+}
+
+void FrameLoader::stop()
+{
+    // http://bugs.webkit.org/show_bug.cgi?id=10854
+    // The frame's last ref may be removed and it will be deleted by checkCompleted().
+    RefPtr<Frame> protector(m_frame);
+    
+    if (m_frame->document()->parser())
+        m_frame->document()->parser()->stopParsing();
+    m_frame->document()->finishParsing();
+
+    if (m_iconLoader)
+        m_iconLoader->stopLoading();
+}
+
+bool FrameLoader::closeURL()
+{
+    history()->saveDocumentState();
+    
+    // Should only send the pagehide event here if the current document exists and has not been placed in the page cache.    
+    Document* currentDocument = m_frame->document();
+    stopLoading(currentDocument && !currentDocument->inPageCache() ? UnloadEventPolicyUnloadAndPageHide : UnloadEventPolicyUnloadOnly);
+    
+    m_frame->editor()->clearUndoRedoOperations();
+    return true;
+}
+
+KURL FrameLoader::iconURL()
+{
+    // If this isn't a top level frame, return nothing
+    if (m_frame->tree() && m_frame->tree()->parent())
+        return KURL();
+
+    // If we have an iconURL from a Link element, return that
+    if (!m_frame->document()->iconURL().isEmpty())
+        return KURL(ParsedURLString, m_frame->document()->iconURL());
+
+    // Don't return a favicon iconURL unless we're http or https
+    if (!m_URL.protocolInHTTPFamily())
+        return KURL();
+
+    KURL url;
+    bool couldSetProtocol = url.setProtocol(m_URL.protocol());
+    ASSERT_UNUSED(couldSetProtocol, couldSetProtocol);
+    url.setHost(m_URL.host());
+    if (m_URL.hasPort())
+        url.setPort(m_URL.port());
+    url.setPath("/favicon.ico");
+    return url;
+}
+
+bool FrameLoader::didOpenURL(const KURL& url)
+{
+    if (m_frame->navigationScheduler()->redirectScheduledDuringLoad()) {
+        // A redirect was scheduled before the document was created.
+        // This can happen when one frame changes another frame's location.
+        return false;
+    }
+
+    m_frame->navigationScheduler()->cancel();
+    m_frame->editor()->clearLastEditCommand();
+
+    m_isComplete = false;
+    m_isLoadingMainResource = true;
+    m_didCallImplicitClose = false;
+
+    // If we are still in the process of initializing an empty document then
+    // its frame is not in a consistent state for rendering, so avoid setJSStatusBarText
+    // since it may cause clients to attempt to render the frame.
+    if (!m_stateMachine.creatingInitialEmptyDocument()) {
+        if (DOMWindow* window = m_frame->existingDOMWindow()) {
+            window->setStatus(String());
+            window->setDefaultStatus(String());
+        }
+    }
+    m_URL = url;
+    if (m_URL.protocolInHTTPFamily() && !m_URL.host().isEmpty() && m_URL.path().isEmpty())
+        m_URL.setPath("/");
+    m_workingURL = m_URL;
+
+    started();
+
+    return true;
+}
+
+void FrameLoader::didExplicitOpen()
+{
+    m_isComplete = false;
+    m_didCallImplicitClose = false;
+
+    // Calling document.open counts as committing the first real document load.
+    if (!m_stateMachine.committedFirstRealDocumentLoad())
+        m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocumentPostCommit);
+    
+    // Prevent window.open(url) -- eg window.open("about:blank") -- from blowing away results
+    // from a subsequent window.document.open / window.document.write call. 
+    // Canceling redirection here works for all cases because document.open 
+    // implicitly precedes document.write.
+    m_frame->navigationScheduler()->cancel(); 
+    if (m_frame->document()->url() != blankURL())
+        m_URL = m_frame->document()->url();
+}
+
+
+void FrameLoader::cancelAndClear()
+{
+    m_frame->navigationScheduler()->cancel();
+
+    if (!m_isComplete)
+        closeURL();
+
+    clear(false);
+    m_frame->script()->updatePlatformScriptObjects();
+}
+
+void FrameLoader::clear(bool clearWindowProperties, bool clearScriptObjects, bool clearFrameView)
+{
+    m_frame->editor()->clear();
+
+    if (!m_needsClear)
+        return;
+    m_needsClear = false;
+    
+    if (!m_frame->document()->inPageCache()) {
+        m_frame->document()->cancelParsing();
+        m_frame->document()->stopActiveDOMObjects();
+        if (m_frame->document()->attached()) {
+            m_frame->document()->willRemove();
+            m_frame->document()->detach();
+            
+            m_frame->document()->removeFocusedNodeOfSubtree(m_frame->document());
+        }
+    }
+
+    // Do this after detaching the document so that the unload event works.
+    if (clearWindowProperties) {
+        m_frame->clearDOMWindow();
+        m_frame->script()->clearWindowShell(m_frame->document()->inPageCache());
+    }
+
+    m_frame->selection()->clear();
+    m_frame->eventHandler()->clear();
+    if (clearFrameView && m_frame->view())
+        m_frame->view()->clear();
+
+    // Do not drop the document before the ScriptController and view are cleared
+    // as some destructors might still try to access the document.
+    m_frame->setDocument(0);
+    writer()->clear();
+
+    m_subframeLoader.clear();
+
+    if (clearScriptObjects)
+        m_frame->script()->clearScriptObjects();
+
+    m_frame->navigationScheduler()->clear();
+
+    m_checkTimer.stop();
+    m_shouldCallCheckCompleted = false;
+    m_shouldCallCheckLoadComplete = false;
+
+    if (m_stateMachine.isDisplayingInitialEmptyDocument() && m_stateMachine.committedFirstRealDocumentLoad())
+        m_stateMachine.advanceTo(FrameLoaderStateMachine::CommittedFirstRealLoad);
+}
+
+void FrameLoader::receivedFirstData()
+{
+    writer()->begin(m_workingURL, false);
+    writer()->setDocumentWasLoadedAsPartOfNavigation();
+
+    dispatchDidCommitLoad();
+    dispatchDidClearWindowObjectsInAllWorlds();
+    
+    if (m_documentLoader) {
+        String ptitle = m_documentLoader->title();
+        // If we have a title let the WebView know about it.
+        if (!ptitle.isNull())
+            m_client->dispatchDidReceiveTitle(ptitle);
+    }
+
+    m_workingURL = KURL();
+
+    double delay;
+    String url;
+    if (!m_documentLoader)
+        return;
+    if (m_frame->inViewSourceMode())
+        return;
+    if (!parseHTTPRefresh(m_documentLoader->response().httpHeaderField("Refresh"), false, delay, url))
+        return;
+
+    if (url.isEmpty())
+        url = m_URL.string();
+    else
+        url = m_frame->document()->completeURL(url).string();
+
+    m_frame->navigationScheduler()->scheduleRedirect(delay, url);
+}
+
+void FrameLoader::setURL(const KURL& url)
+{
+    KURL ref(url);
+    ref.setUser(String());
+    ref.setPass(String());
+    ref.removeFragmentIdentifier();
+    m_outgoingReferrer = ref.string();
+    m_URL = url;
+}
+
+void FrameLoader::didBeginDocument(bool dispatch)
+{
+    m_needsClear = true;
+    m_isComplete = false;
+    m_didCallImplicitClose = false;
+    m_isLoadingMainResource = true;
+    m_frame->document()->setReadyState(Document::Loading);
+
+    if (m_pendingStateObject) {
+        m_frame->document()->statePopped(m_pendingStateObject.get());
+        m_pendingStateObject.clear();
+    }
+
+    if (dispatch)
+        dispatchDidClearWindowObjectsInAllWorlds();
+
+    updateFirstPartyForCookies();
+
+    Settings* settings = m_frame->document()->settings();
+    m_frame->document()->cachedResourceLoader()->setAutoLoadImages(settings && settings->loadsImagesAutomatically());
+#ifdef ANDROID_BLOCK_NETWORK_IMAGE
+    m_frame->document()->cachedResourceLoader()->setBlockNetworkImage(settings && settings->blockNetworkImage());
+#endif
+
+    if (m_documentLoader) {
+        String dnsPrefetchControl = m_documentLoader->response().httpHeaderField("X-DNS-Prefetch-Control");
+        if (!dnsPrefetchControl.isEmpty())
+            m_frame->document()->parseDNSPrefetchControlHeader(dnsPrefetchControl);
+    }
+
+    history()->restoreDocumentState();
+}
+
+void FrameLoader::didEndDocument()
+{
+    m_isLoadingMainResource = false;
+}
+
+void FrameLoader::iconLoadDecisionAvailable()
+{
+    if (!m_mayLoadIconLater)
+        return;
+    LOG(IconDatabase, "FrameLoader %p was told a load decision is available for its icon", this);
+    startIconLoader();
+    m_mayLoadIconLater = false;
+}
+
+void FrameLoader::startIconLoader()
+{
+    // FIXME: We kick off the icon loader when the frame is done receiving its main resource.
+    // But we should instead do it when we're done parsing the head element.
+    if (!isLoadingMainFrame())
+        return;
+
+    if (!iconDatabase() || !iconDatabase()->isEnabled())
+        return;
+    
+    KURL url(iconURL());
+    String urlString(url.string());
+    if (urlString.isEmpty())
+        return;
+
+    // If we're not reloading and the icon database doesn't say to load now then bail before we actually start the load
+    if (loadType() != FrameLoadTypeReload && loadType() != FrameLoadTypeReloadFromOrigin) {
+        IconLoadDecision decision = iconDatabase()->loadDecisionForIconURL(urlString, m_documentLoader.get());
+        if (decision == IconLoadNo) {
+            LOG(IconDatabase, "FrameLoader::startIconLoader() - Told not to load this icon, committing iconURL %s to database for pageURL mapping", urlString.ascii().data());
+            commitIconURLToIconDatabase(url);
+            
+            // We were told not to load this icon - that means this icon is already known by the database
+            // If the icon data hasn't been read in from disk yet, kick off the read of the icon from the database to make sure someone
+            // has done it.  This is after registering for the notification so the WebView can call the appropriate delegate method.
+            // Otherwise if the icon data *is* available, notify the delegate
+            if (!iconDatabase()->iconDataKnownForIconURL(urlString)) {
+                LOG(IconDatabase, "Told not to load icon %s but icon data is not yet available - registering for notification and requesting load from disk", urlString.ascii().data());
+                m_client->registerForIconNotification();
+                iconDatabase()->iconForPageURL(m_URL.string(), IntSize(0, 0));
+                iconDatabase()->iconForPageURL(originalRequestURL().string(), IntSize(0, 0));
+            } else
+                m_client->dispatchDidReceiveIcon();
+                
+            return;
+        } 
+        
+        if (decision == IconLoadUnknown) {
+            // In this case, we may end up loading the icon later, but we still want to commit the icon url mapping to the database
+            // just in case we don't end up loading later - if we commit the mapping a second time after the load, that's no big deal
+            // We also tell the client to register for the notification that the icon is received now so it isn't missed in case the 
+            // icon is later read in from disk
+            LOG(IconDatabase, "FrameLoader %p might load icon %s later", this, urlString.ascii().data());
+            m_mayLoadIconLater = true;    
+            m_client->registerForIconNotification();
+            commitIconURLToIconDatabase(url);
+            return;
+        }
+    }
+
+    // People who want to avoid loading images generally want to avoid loading all images.
+    // Now that we've accounted for URL mapping, avoid starting the network load if images aren't set to display automatically.
+    Settings* settings = m_frame->settings();
+    if (settings && !settings->loadsImagesAutomatically())
+        return;
+
+    // This is either a reload or the icon database said "yes, load the icon", so kick off the load!
+    if (!m_iconLoader)
+        m_iconLoader = IconLoader::create(m_frame);
+        
+    m_iconLoader->startLoading();
+}
+
+void FrameLoader::commitIconURLToIconDatabase(const KURL& icon)
+{
+    ASSERT(iconDatabase());
+    LOG(IconDatabase, "Committing iconURL %s to database for pageURLs %s and %s", icon.string().ascii().data(), m_URL.string().ascii().data(), originalRequestURL().string().ascii().data());
+    iconDatabase()->setIconURLForPageURL(icon.string(), m_URL.string());
+    iconDatabase()->setIconURLForPageURL(icon.string(), originalRequestURL().string());
+}
+
+void FrameLoader::finishedParsing()
+{
+    if (m_stateMachine.creatingInitialEmptyDocument())
+        return;
+
+    m_frame->injectUserScripts(InjectAtDocumentEnd);
+
+    // This can be called from the Frame's destructor, in which case we shouldn't protect ourselves
+    // because doing so will cause us to re-enter the destructor when protector goes out of scope.
+    // Null-checking the FrameView indicates whether or not we're in the destructor.
+    RefPtr<Frame> protector = m_frame->view() ? m_frame : 0;
+
+    m_client->dispatchDidFinishDocumentLoad();
+
+    checkCompleted();
+
+    if (!m_frame->view())
+        return; // We are being destroyed by something checkCompleted called.
+
+    // Check if the scrollbars are really needed for the content.
+    // If not, remove them, relayout, and repaint.
+    m_frame->view()->restoreScrollbar();
+    m_frame->view()->scrollToFragment(m_URL);
+}
+
+void FrameLoader::loadDone()
+{
+    checkCompleted();
+}
+
+bool FrameLoader::allChildrenAreComplete() const
+{
+    for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling()) {
+        if (!child->loader()->m_isComplete)
+            return false;
+    }
+    return true;
+}
+
+bool FrameLoader::allAncestorsAreComplete() const
+{
+    for (Frame* ancestor = m_frame; ancestor; ancestor = ancestor->tree()->parent()) {
+        if (!ancestor->loader()->m_isComplete)
+            return false;
+    }
+    return true;
+}
+
+void FrameLoader::checkCompleted()
+{
+    m_shouldCallCheckCompleted = false;
+
+    if (m_frame->view())
+        m_frame->view()->checkStopDelayingDeferredRepaints();
+
+    // Any frame that hasn't completed yet?
+    if (!allChildrenAreComplete())
+        return;
+
+    // Have we completed before?
+    if (m_isComplete)
+        return;
+
+    // Are we still parsing?
+    if (m_frame->document()->parsing())
+        return;
+
+    // Still waiting for images/scripts?
+    if (numRequests(m_frame->document()))
+        return;
+
+    // Still waiting for elements that don't go through a FrameLoader?
+    if (m_frame->document()->isDelayingLoadEvent())
+        return;
+
+    // OK, completed.
+    m_isComplete = true;
+    m_frame->document()->setReadyState(Document::Complete);
+
+    RefPtr<Frame> protect(m_frame);
+    checkCallImplicitClose(); // if we didn't do it before
+
+    m_frame->navigationScheduler()->startTimer();
+
+    completed();
+    if (m_frame->page())
+        checkLoadComplete();
+}
+
+void FrameLoader::checkTimerFired(Timer<FrameLoader>*)
+{
+    if (Page* page = m_frame->page()) {
+        if (page->defersLoading())
+            return;
+    }
+    if (m_shouldCallCheckCompleted)
+        checkCompleted();
+    if (m_shouldCallCheckLoadComplete)
+        checkLoadComplete();
+}
+
+void FrameLoader::startCheckCompleteTimer()
+{
+    if (!(m_shouldCallCheckCompleted || m_shouldCallCheckLoadComplete))
+        return;
+    if (m_checkTimer.isActive())
+        return;
+    m_checkTimer.startOneShot(0);
+}
+
+void FrameLoader::scheduleCheckCompleted()
+{
+    m_shouldCallCheckCompleted = true;
+    startCheckCompleteTimer();
+}
+
+void FrameLoader::scheduleCheckLoadComplete()
+{
+    m_shouldCallCheckLoadComplete = true;
+    startCheckCompleteTimer();
+}
+
+void FrameLoader::checkCallImplicitClose()
+{
+    if (m_didCallImplicitClose || m_frame->document()->parsing() || m_frame->document()->isDelayingLoadEvent())
+        return;
+
+    if (!allChildrenAreComplete())
+        return; // still got a frame running -> too early
+
+    m_didCallImplicitClose = true;
+    m_wasUnloadEventEmitted = false;
+    m_frame->document()->implicitClose();
+}
+
+KURL FrameLoader::baseURL() const
+{
+    ASSERT(m_frame->document());
+    return m_frame->document()->baseURL();
+}
+
+KURL FrameLoader::completeURL(const String& url)
+{
+    ASSERT(m_frame->document());
+    return m_frame->document()->completeURL(url);
+}
+
+void FrameLoader::loadURLIntoChildFrame(const KURL& url, const String& referer, Frame* childFrame)
+{
+    ASSERT(childFrame);
+
+#if ENABLE(ARCHIVE) // ANDROID extension: disabled to reduce code size
+    RefPtr<Archive> subframeArchive = activeDocumentLoader()->popArchiveForSubframe(childFrame->tree()->uniqueName());    
+    if (subframeArchive) {
+        childFrame->loader()->loadArchive(subframeArchive.release());
+        return;
+    }
+#endif
+
+    HistoryItem* parentItem = history()->currentItem();
+    // If we're moving in the back/forward list, we might want to replace the content
+    // of this child frame with whatever was there at that point.
+    if (parentItem && parentItem->children().size() && isBackForwardLoadType(loadType())) {
+        HistoryItem* childItem = parentItem->childItemWithTarget(childFrame->tree()->uniqueName());
+        if (childItem) {
+            childFrame->loader()->loadDifferentDocumentItem(childItem, loadType());
+            return;
+        }
+    }
+
+    childFrame->loader()->loadURL(url, referer, String(), false, FrameLoadTypeRedirectWithLockedBackForwardList, 0, 0);
+}
+
+#if ENABLE(ARCHIVE) // ANDROID extension: disabled to reduce code size
+void FrameLoader::loadArchive(PassRefPtr<Archive> prpArchive)
+{
+    RefPtr<Archive> archive = prpArchive;
+    
+    ArchiveResource* mainResource = archive->mainResource();
+    ASSERT(mainResource);
+    if (!mainResource)
+        return;
+        
+    SubstituteData substituteData(mainResource->data(), mainResource->mimeType(), mainResource->textEncoding(), KURL());
+    
+    ResourceRequest request(mainResource->url());
+#if PLATFORM(MAC)
+    request.applyWebArchiveHackForMail();
+#endif
+
+    RefPtr<DocumentLoader> documentLoader = m_client->createDocumentLoader(request, substituteData);
+    documentLoader->addAllArchiveResources(archive.get());
+    load(documentLoader.get());
+}
+#endif
+
+ObjectContentType FrameLoader::defaultObjectContentType(const KURL& url, const String& mimeTypeIn)
+{
+    String mimeType = mimeTypeIn;
+    // We don't use MIMETypeRegistry::getMIMETypeForPath() because it returns "application/octet-stream" upon failure
+    if (mimeType.isEmpty())
+        mimeType = MIMETypeRegistry::getMIMETypeForExtension(url.path().substring(url.path().reverseFind('.') + 1));
+
+    if (mimeType.isEmpty())
+        return ObjectContentFrame; // Go ahead and hope that we can display the content.
+
+    if (MIMETypeRegistry::isSupportedImageMIMEType(mimeType))
+        return WebCore::ObjectContentImage;
+
+#if !PLATFORM(MAC) && !PLATFORM(CHROMIUM) && !PLATFORM(EFL) // Mac has no PluginDatabase, nor does Chromium or EFL
+    if (PluginDatabase::installedPlugins()->isMIMETypeRegistered(mimeType))
+        return WebCore::ObjectContentNetscapePlugin;
+#endif
+
+    if (MIMETypeRegistry::isSupportedNonImageMIMEType(mimeType))
+        return WebCore::ObjectContentFrame;
+
+    return WebCore::ObjectContentNone;
+}
+
+String FrameLoader::outgoingReferrer() const
+{
+    return m_outgoingReferrer;
+}
+
+String FrameLoader::outgoingOrigin() const
+{
+    return m_frame->document()->securityOrigin()->toString();
+}
+
+bool FrameLoader::isMixedContent(SecurityOrigin* context, const KURL& url)
+{
+    if (context->protocol() != "https")
+        return false;  // We only care about HTTPS security origins.
+
+    if (!url.isValid() || SchemeRegistry::shouldTreatURLSchemeAsSecure(url.protocol()))
+        return false;  // Loading these protocols is secure.
+
+    return true;
+}
+
+void FrameLoader::checkIfDisplayInsecureContent(SecurityOrigin* context, const KURL& url)
+{
+    if (!isMixedContent(context, url))
+        return;
+
+    String message = makeString("The page at ", m_URL.string(), " displayed insecure content from ", url.string(), ".\n");
+    m_frame->domWindow()->console()->addMessage(HTMLMessageSource, LogMessageType, WarningMessageLevel, message, 1, String());
+
+    m_client->didDisplayInsecureContent();
+}
+
+void FrameLoader::checkIfRunInsecureContent(SecurityOrigin* context, const KURL& url)
+{
+    if (!isMixedContent(context, url))
+        return;
+
+    String message = makeString("The page at ", m_URL.string(), " ran insecure content from ", url.string(), ".\n");
+    m_frame->domWindow()->console()->addMessage(HTMLMessageSource, LogMessageType, WarningMessageLevel, message, 1, String());
+
+    m_client->didRunInsecureContent(context);
+}
+
+Frame* FrameLoader::opener()
+{
+    return m_opener;
+}
+
+void FrameLoader::setOpener(Frame* opener)
+{
+    if (m_opener)
+        m_opener->loader()->m_openedFrames.remove(m_frame);
+    if (opener)
+        opener->loader()->m_openedFrames.add(m_frame);
+    m_opener = opener;
+
+    if (m_frame->document()) {
+        m_frame->document()->initSecurityContext();
+        m_frame->domWindow()->setSecurityOrigin(m_frame->document()->securityOrigin());
+    }
+}
+
+// FIXME: This does not belong in FrameLoader!
+void FrameLoader::handleFallbackContent()
+{
+    HTMLFrameOwnerElement* owner = m_frame->ownerElement();
+    if (!owner || !owner->hasTagName(objectTag))
+        return;
+    static_cast<HTMLObjectElement*>(owner)->renderFallbackContent();
+}
+
+void FrameLoader::provisionalLoadStarted()
+{    
+#ifdef ANDROID_INSTRUMENT
+    if (!m_frame->tree()->parent())
+        android::TimeCounter::reset();
+#endif
+    if (m_stateMachine.firstLayoutDone())
+        m_stateMachine.advanceTo(FrameLoaderStateMachine::CommittedFirstRealLoad);
+    m_frame->navigationScheduler()->cancel(true);
+    m_client->provisionalLoadStarted();
+}
+
+bool FrameLoader::isProcessingUserGesture()
+{
+    Frame* frame = m_frame->tree()->top();
+    if (!frame->script()->canExecuteScripts(NotAboutToExecuteScript))
+        return true; // If JavaScript is disabled, a user gesture must have initiated the navigation.
+    return ScriptController::processingUserGesture(); // FIXME: Use pageIsProcessingUserGesture.
+}
+
+void FrameLoader::resetMultipleFormSubmissionProtection()
+{
+    m_submittedFormURL = KURL();
+}
+
+void FrameLoader::willSetEncoding()
+{
+    if (!m_workingURL.isEmpty())
+        receivedFirstData();
+}
+
+#if ENABLE(WML)
+static inline bool frameContainsWMLContent(Frame* frame)
+{
+    Document* document = frame ? frame->document() : 0;
+    if (!document)
+        return false;
+
+    return document->containsWMLContent() || document->isWMLDocument();
+}
+#endif
+
+void FrameLoader::updateFirstPartyForCookies()
+{
+    if (m_frame->tree()->parent())
+        setFirstPartyForCookies(m_frame->tree()->parent()->document()->firstPartyForCookies());
+    else
+        setFirstPartyForCookies(m_URL);
+}
+
+void FrameLoader::setFirstPartyForCookies(const KURL& url)
+{
+    m_frame->document()->setFirstPartyForCookies(url);
+    for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling())
+        child->loader()->setFirstPartyForCookies(url);
+}
+
+// This does the same kind of work that didOpenURL does, except it relies on the fact
+// that a higher level already checked that the URLs match and the scrolling is the right thing to do.
+void FrameLoader::loadInSameDocument(const KURL& url, SerializedScriptValue* stateObject, bool isNewNavigation)
+{
+    // If we have a state object, we cannot also be a new navigation.
+    ASSERT(!stateObject || (stateObject && !isNewNavigation));
+
+    // Update the data source's request with the new URL to fake the URL change
+    m_frame->document()->setURL(url);
+    documentLoader()->replaceRequestURLForSameDocumentNavigation(url);
+    if (isNewNavigation && !shouldTreatURLAsSameAsCurrent(url) && !stateObject) {
+        // NB: must happen after replaceRequestURLForSameDocumentNavigation(), since we add 
+        // based on the current request. Must also happen before we openURL and displace the 
+        // scroll position, since adding the BF item will save away scroll state.
+        
+        // NB2:  If we were loading a long, slow doc, and the user anchor nav'ed before
+        // it was done, currItem is now set the that slow doc, and prevItem is whatever was
+        // before it.  Adding the b/f item will bump the slow doc down to prevItem, even
+        // though its load is not yet done.  I think this all works out OK, for one because
+        // we have already saved away the scroll and doc state for the long slow load,
+        // but it's not an obvious case.
+
+        history()->updateBackForwardListForFragmentScroll();
+    }
+    
+    String oldURL;
+    bool hashChange = equalIgnoringFragmentIdentifier(url, m_URL) && url.fragmentIdentifier() != m_URL.fragmentIdentifier();
+    oldURL = m_URL;
+    
+    m_URL = url;
+    history()->updateForSameDocumentNavigation();
+
+    // If we were in the autoscroll/panScroll mode we want to stop it before following the link to the anchor
+    if (hashChange)
+        m_frame->eventHandler()->stopAutoscrollTimer();
+    
+    // It's important to model this as a load that starts and immediately finishes.
+    // Otherwise, the parent frame may think we never finished loading.
+    started();
+
+    // We need to scroll to the fragment whether or not a hash change occurred, since
+    // the user might have scrolled since the previous navigation.
+    if (FrameView* view = m_frame->view())
+        view->scrollToFragment(m_URL);
+    
+    m_isComplete = false;
+    checkCompleted();
+
+    if (isNewNavigation) {
+        // This will clear previousItem from the rest of the frame tree that didn't
+        // doing any loading. We need to make a pass on this now, since for anchor nav
+        // we'll not go through a real load and reach Completed state.
+        checkLoadComplete();
+    }
+
+    m_client->dispatchDidNavigateWithinPage();
+
+    m_frame->document()->statePopped(stateObject ? stateObject : SerializedScriptValue::nullValue());
+    m_client->dispatchDidPopStateWithinPage();
+    
+    if (hashChange) {
+        m_frame->document()->enqueueHashchangeEvent(oldURL, url);
+        m_client->dispatchDidChangeLocationWithinPage();
+    }
+    
+    // FrameLoaderClient::didFinishLoad() tells the internal load delegate the load finished with no error
+    m_client->didFinishLoad();
+}
+
+bool FrameLoader::isComplete() const
+{
+    return m_isComplete;
+}
+
+void FrameLoader::completed()
+{
+    RefPtr<Frame> protect(m_frame);
+
+    for (Frame* descendant = m_frame->tree()->traverseNext(m_frame); descendant; descendant = descendant->tree()->traverseNext(m_frame))
+        descendant->navigationScheduler()->startTimer();
+
+    if (Frame* parent = m_frame->tree()->parent())
+        parent->loader()->checkCompleted();
+
+    if (m_frame->view())
+        m_frame->view()->maintainScrollPositionAtAnchor(0);
+}
+
+void FrameLoader::started()
+{
+    for (Frame* frame = m_frame; frame; frame = frame->tree()->parent())
+        frame->loader()->m_isComplete = false;
+}
+
+void FrameLoader::prepareForLoadStart()
+{
+    if (Page* page = m_frame->page())
+        page->progress()->progressStarted(m_frame);
+    m_client->dispatchDidStartProvisionalLoad();
+}
+
+void FrameLoader::setupForReplace()
+{
+    setState(FrameStateProvisional);
+    m_provisionalDocumentLoader = m_documentLoader;
+    m_documentLoader = 0;
+    detachChildren();
+}
+
+void FrameLoader::setupForReplaceByMIMEType(const String& newMIMEType)
+{
+    activeDocumentLoader()->setupForReplaceByMIMEType(newMIMEType);
+}
+
+// This is a hack to allow keep navigation to http/https feeds working. To remove this
+// we need to introduce new API akin to registerURLSchemeAsLocal, that registers a
+// protocols navigation policy.
+static bool isFeedWithNestedProtocolInHTTPFamily(const KURL& url)
+{
+    const String& urlString = url.string();
+    if (!urlString.startsWith("feed", false))
+        return false;
+
+    return urlString.startsWith("feed://", false) 
+        || urlString.startsWith("feed:http:", false) || urlString.startsWith("feed:https:", false)
+        || urlString.startsWith("feeds:http:", false) || urlString.startsWith("feeds:https:", false)
+        || urlString.startsWith("feedsearch:http:", false) || urlString.startsWith("feedsearch:https:", false);
+}
+
+void FrameLoader::loadFrameRequest(const FrameLoadRequest& request, bool lockHistory, bool lockBackForwardList,
+    PassRefPtr<Event> event, PassRefPtr<FormState> formState, ReferrerPolicy referrerPolicy)
+{    
+    KURL url = request.resourceRequest().url();
+
+    ASSERT(m_frame->document());
+    // FIXME: Should we move the isFeedWithNestedProtocolInHTTPFamily logic inside SecurityOrigin::canDisplay?
+    if (!isFeedWithNestedProtocolInHTTPFamily(url) && !request.requester()->canDisplay(url)) {
+        reportLocalLoadFailed(m_frame, url.string());
+        return;
+    }
+
+    String referrer;
+    String argsReferrer = request.resourceRequest().httpReferrer();
+    if (!argsReferrer.isEmpty())
+        referrer = argsReferrer;
+    else
+        referrer = m_outgoingReferrer;
+
+    if (SecurityOrigin::shouldHideReferrer(url, referrer) || referrerPolicy == NoReferrer)
+        referrer = String();
+    
+    FrameLoadType loadType;
+    if (request.resourceRequest().cachePolicy() == ReloadIgnoringCacheData)
+        loadType = FrameLoadTypeReload;
+    else if (lockBackForwardList)
+        loadType = FrameLoadTypeRedirectWithLockedBackForwardList;
+    else
+        loadType = FrameLoadTypeStandard;
+
+    if (request.resourceRequest().httpMethod() == "POST")
+        loadPostRequest(request.resourceRequest(), referrer, request.frameName(), lockHistory, loadType, event, formState.get());
+    else
+        loadURL(request.resourceRequest().url(), referrer, request.frameName(), lockHistory, loadType, event, formState.get());
+
+    // FIXME: It's possible this targetFrame will not be the same frame that was targeted by the actual
+    // load if frame names have changed.
+    Frame* sourceFrame = formState ? formState->sourceFrame() : m_frame;
+    Frame* targetFrame = sourceFrame->loader()->findFrameForNavigation(request.frameName());
+    if (targetFrame && targetFrame != sourceFrame) {
+        if (Page* page = targetFrame->page())
+            page->chrome()->focus();
+    }
+}
+
+void FrameLoader::loadURL(const KURL& newURL, const String& referrer, const String& frameName, bool lockHistory, FrameLoadType newLoadType,
+    PassRefPtr<Event> event, PassRefPtr<FormState> prpFormState)
+{
+    RefPtr<FormState> formState = prpFormState;
+    bool isFormSubmission = formState;
+    
+    ResourceRequest request(newURL);
+    if (!referrer.isEmpty()) {
+        request.setHTTPReferrer(referrer);
+        RefPtr<SecurityOrigin> referrerOrigin = SecurityOrigin::createFromString(referrer);
+        addHTTPOriginIfNeeded(request, referrerOrigin->toString());
+    }
+    addExtraFieldsToRequest(request, newLoadType, true, event || isFormSubmission);
+    if (newLoadType == FrameLoadTypeReload || newLoadType == FrameLoadTypeReloadFromOrigin)
+        request.setCachePolicy(ReloadIgnoringCacheData);
+
+    ASSERT(newLoadType != FrameLoadTypeSame);
+
+    // The search for a target frame is done earlier in the case of form submission.
+    Frame* targetFrame = isFormSubmission ? 0 : findFrameForNavigation(frameName);
+    if (targetFrame && targetFrame != m_frame) {
+        targetFrame->loader()->loadURL(newURL, referrer, String(), lockHistory, newLoadType, event, formState.release());
+        return;
+    }
+
+    if (m_pageDismissalEventBeingDispatched)
+        return;
+
+    NavigationAction action(newURL, newLoadType, isFormSubmission, event);
+
+    if (!targetFrame && !frameName.isEmpty()) {
+        policyChecker()->checkNewWindowPolicy(action, FrameLoader::callContinueLoadAfterNewWindowPolicy,
+            request, formState.release(), frameName, this);
+        return;
+    }
+
+    RefPtr<DocumentLoader> oldDocumentLoader = m_documentLoader;
+
+    bool sameURL = shouldTreatURLAsSameAsCurrent(newURL);
+    const String& httpMethod = request.httpMethod();
+    
+    // Make sure to do scroll to anchor processing even if the URL is
+    // exactly the same so pages with '#' links and DHTML side effects
+    // work properly.
+    if (shouldScrollToAnchor(isFormSubmission, httpMethod, newLoadType, newURL)) {
+        oldDocumentLoader->setTriggeringAction(action);
+        policyChecker()->stopCheck();
+        policyChecker()->setLoadType(newLoadType);
+        policyChecker()->checkNavigationPolicy(request, oldDocumentLoader.get(), formState.release(),
+            callContinueFragmentScrollAfterNavigationPolicy, this);
+    } else {
+        // must grab this now, since this load may stop the previous load and clear this flag
+        bool isRedirect = m_quickRedirectComing;
+        loadWithNavigationAction(request, action, lockHistory, newLoadType, formState.release());
+        if (isRedirect) {
+            m_quickRedirectComing = false;
+            if (m_provisionalDocumentLoader)
+                m_provisionalDocumentLoader->setIsClientRedirect(true);
+        } else if (sameURL)
+            // Example of this case are sites that reload the same URL with a different cookie
+            // driving the generated content, or a master frame with links that drive a target
+            // frame, where the user has clicked on the same link repeatedly.
+            m_loadType = FrameLoadTypeSame;
+    }
+}
+
+void FrameLoader::load(const ResourceRequest& request, bool lockHistory)
+{
+    load(request, SubstituteData(), lockHistory);
+}
+
+void FrameLoader::load(const ResourceRequest& request, const SubstituteData& substituteData, bool lockHistory)
+{
+    if (m_inStopAllLoaders)
+        return;
+        
+    // FIXME: is this the right place to reset loadType? Perhaps this should be done after loading is finished or aborted.
+    m_loadType = FrameLoadTypeStandard;
+    RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(request, substituteData);
+    if (lockHistory && m_documentLoader)
+        loader->setClientRedirectSourceForHistory(m_documentLoader->didCreateGlobalHistoryEntry() ? m_documentLoader->urlForHistory() : m_documentLoader->clientRedirectSourceForHistory());
+    load(loader.get());
+}
+
+void FrameLoader::load(const ResourceRequest& request, const String& frameName, bool lockHistory)
+{
+    if (frameName.isEmpty()) {
+        load(request, lockHistory);
+        return;
+    }
+
+    Frame* frame = findFrameForNavigation(frameName);
+    if (frame) {
+        frame->loader()->load(request, lockHistory);
+        return;
+    }
+
+    policyChecker()->checkNewWindowPolicy(NavigationAction(request.url(), NavigationTypeOther), FrameLoader::callContinueLoadAfterNewWindowPolicy, request, 0, frameName, this);
+}
+
+void FrameLoader::loadWithNavigationAction(const ResourceRequest& request, const NavigationAction& action, bool lockHistory, FrameLoadType type, PassRefPtr<FormState> formState)
+{
+    RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(request, SubstituteData());
+    if (lockHistory && m_documentLoader)
+        loader->setClientRedirectSourceForHistory(m_documentLoader->didCreateGlobalHistoryEntry() ? m_documentLoader->urlForHistory() : m_documentLoader->clientRedirectSourceForHistory());
+
+    loader->setTriggeringAction(action);
+    if (m_documentLoader)
+        loader->setOverrideEncoding(m_documentLoader->overrideEncoding());
+
+    loadWithDocumentLoader(loader.get(), type, formState);
+}
+
+void FrameLoader::load(DocumentLoader* newDocumentLoader)
+{
+    ResourceRequest& r = newDocumentLoader->request();
+    addExtraFieldsToMainResourceRequest(r);
+    FrameLoadType type;
+
+    if (shouldTreatURLAsSameAsCurrent(newDocumentLoader->originalRequest().url())) {
+        r.setCachePolicy(ReloadIgnoringCacheData);
+        type = FrameLoadTypeSame;
+    } else
+        type = FrameLoadTypeStandard;
+
+    if (m_documentLoader)
+        newDocumentLoader->setOverrideEncoding(m_documentLoader->overrideEncoding());
+    
+    // When we loading alternate content for an unreachable URL that we're
+    // visiting in the history list, we treat it as a reload so the history list 
+    // is appropriately maintained.
+    //
+    // FIXME: This seems like a dangerous overloading of the meaning of "FrameLoadTypeReload" ...
+    // shouldn't a more explicit type of reload be defined, that means roughly 
+    // "load without affecting history" ? 
+    if (shouldReloadToHandleUnreachableURL(newDocumentLoader)) {
+        ASSERT(type == FrameLoadTypeStandard);
+        type = FrameLoadTypeReload;
+    }
+
+    loadWithDocumentLoader(newDocumentLoader, type, 0);
+}
+
+void FrameLoader::loadWithDocumentLoader(DocumentLoader* loader, FrameLoadType type, PassRefPtr<FormState> prpFormState)
+{
+    // Retain because dispatchBeforeLoadEvent may release the last reference to it.
+    RefPtr<Frame> protect(m_frame);
+
+    ASSERT(m_client->hasWebView());
+
+    // Unfortunately the view must be non-nil, this is ultimately due
+    // to parser requiring a FrameView.  We should fix this dependency.
+
+    ASSERT(m_frame->view());
+
+    if (m_pageDismissalEventBeingDispatched)
+        return;
+
+    if (m_frame->document())
+        m_previousUrl = m_frame->document()->url();
+
+    policyChecker()->setLoadType(type);
+    RefPtr<FormState> formState = prpFormState;
+    bool isFormSubmission = formState;
+
+    const KURL& newURL = loader->request().url();
+    const String& httpMethod = loader->request().httpMethod();
+
+    if (shouldScrollToAnchor(isFormSubmission,  httpMethod, policyChecker()->loadType(), newURL)) {
+        RefPtr<DocumentLoader> oldDocumentLoader = m_documentLoader;
+        NavigationAction action(newURL, policyChecker()->loadType(), isFormSubmission);
+
+        oldDocumentLoader->setTriggeringAction(action);
+        policyChecker()->stopCheck();
+        policyChecker()->checkNavigationPolicy(loader->request(), oldDocumentLoader.get(), formState,
+            callContinueFragmentScrollAfterNavigationPolicy, this);
+    } else {
+        if (Frame* parent = m_frame->tree()->parent())
+            loader->setOverrideEncoding(parent->loader()->documentLoader()->overrideEncoding());
+
+        policyChecker()->stopCheck();
+        setPolicyDocumentLoader(loader);
+        if (loader->triggeringAction().isEmpty())
+            loader->setTriggeringAction(NavigationAction(newURL, policyChecker()->loadType(), isFormSubmission));
+
+        if (Element* ownerElement = m_frame->document()->ownerElement()) {
+            if (!ownerElement->dispatchBeforeLoadEvent(loader->request().url().string())) {
+                continueLoadAfterNavigationPolicy(loader->request(), formState, false);
+                return;
+            }
+        }
+
+        policyChecker()->checkNavigationPolicy(loader->request(), loader, formState,
+            callContinueLoadAfterNavigationPolicy, this);
+    }
+}
+
+void FrameLoader::reportLocalLoadFailed(Frame* frame, const String& url)
+{
+    ASSERT(!url.isEmpty());
+    if (!frame)
+        return;
+
+    frame->domWindow()->console()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, "Not allowed to load local resource: " + url, 0, String());
+}
+
+const ResourceRequest& FrameLoader::initialRequest() const
+{
+    return activeDocumentLoader()->originalRequest();
+}
+
+bool FrameLoader::willLoadMediaElementURL(KURL& url)
+{
+    ResourceRequest request(url);
+
+    unsigned long identifier;
+    ResourceError error;
+    requestFromDelegate(request, identifier, error);
+    notifier()->sendRemainingDelegateMessages(m_documentLoader.get(), identifier, ResourceResponse(url, String(), -1, String(), String()), -1, error);
+
+    url = request.url();
+
+    return error.isNull();
+}
+
+bool FrameLoader::shouldReloadToHandleUnreachableURL(DocumentLoader* docLoader)
+{
+    KURL unreachableURL = docLoader->unreachableURL();
+
+    if (unreachableURL.isEmpty())
+        return false;
+
+    if (!isBackForwardLoadType(policyChecker()->loadType()))
+        return false;
+
+    // We only treat unreachableURLs specially during the delegate callbacks
+    // for provisional load errors and navigation policy decisions. The former
+    // case handles well-formed URLs that can't be loaded, and the latter
+    // case handles malformed URLs and unknown schemes. Loading alternate content
+    // at other times behaves like a standard load.
+    DocumentLoader* compareDocumentLoader = 0;
+    if (policyChecker()->delegateIsDecidingNavigationPolicy() || policyChecker()->delegateIsHandlingUnimplementablePolicy())
+        compareDocumentLoader = m_policyDocumentLoader.get();
+    else if (m_delegateIsHandlingProvisionalLoadError)
+        compareDocumentLoader = m_provisionalDocumentLoader.get();
+
+    return compareDocumentLoader && unreachableURL == compareDocumentLoader->request().url();
+}
+
+void FrameLoader::reloadWithOverrideEncoding(const String& encoding)
+{
+    if (!m_documentLoader)
+        return;
+
+    ResourceRequest request = m_documentLoader->request();
+    KURL unreachableURL = m_documentLoader->unreachableURL();
+    if (!unreachableURL.isEmpty())
+        request.setURL(unreachableURL);
+
+    request.setCachePolicy(ReturnCacheDataElseLoad);
+
+    RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(request, SubstituteData());
+    setPolicyDocumentLoader(loader.get());
+
+    loader->setOverrideEncoding(encoding);
+
+    loadWithDocumentLoader(loader.get(), FrameLoadTypeReload, 0);
+}
+
+void FrameLoader::reload(bool endToEndReload)
+{
+    if (!m_documentLoader)
+        return;
+
+    // If a window is created by javascript, its main frame can have an empty but non-nil URL.
+    // Reloading in this case will lose the current contents (see 4151001).
+    if (m_documentLoader->request().url().isEmpty())
+        return;
+
+    ResourceRequest initialRequest = m_documentLoader->request();
+
+    // Replace error-page URL with the URL we were trying to reach.
+    KURL unreachableURL = m_documentLoader->unreachableURL();
+    if (!unreachableURL.isEmpty())
+        initialRequest.setURL(unreachableURL);
+    
+    // Create a new document loader for the reload, this will become m_documentLoader eventually,
+    // but first it has to be the "policy" document loader, and then the "provisional" document loader.
+    RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(initialRequest, SubstituteData());
+
+    ResourceRequest& request = loader->request();
+
+    // FIXME: We don't have a mechanism to revalidate the main resource without reloading at the moment.
+    request.setCachePolicy(ReloadIgnoringCacheData);
+
+    // If we're about to re-post, set up action so the application can warn the user.
+    if (request.httpMethod() == "POST")
+        loader->setTriggeringAction(NavigationAction(request.url(), NavigationTypeFormResubmitted));
+
+    loader->setOverrideEncoding(m_documentLoader->overrideEncoding());
+    
+    loadWithDocumentLoader(loader.get(), endToEndReload ? FrameLoadTypeReloadFromOrigin : FrameLoadTypeReload, 0);
+}
+
+static bool canAccessAncestor(const SecurityOrigin* activeSecurityOrigin, Frame* targetFrame)
+{
+    // targetFrame can be NULL when we're trying to navigate a top-level frame
+    // that has a NULL opener.
+    if (!targetFrame)
+        return false;
+
+    const bool isLocalActiveOrigin = activeSecurityOrigin->isLocal();
+    for (Frame* ancestorFrame = targetFrame; ancestorFrame; ancestorFrame = ancestorFrame->tree()->parent()) {
+        Document* ancestorDocument = ancestorFrame->document();
+        if (!ancestorDocument)
+            return true;
+
+        const SecurityOrigin* ancestorSecurityOrigin = ancestorDocument->securityOrigin();
+        if (activeSecurityOrigin->canAccess(ancestorSecurityOrigin))
+            return true;
+        
+        // Allow file URL descendant navigation even when allowFileAccessFromFileURLs is false.
+        if (isLocalActiveOrigin && ancestorSecurityOrigin->isLocal())
+            return true;
+    }
+
+    return false;
+}
+
+bool FrameLoader::shouldAllowNavigation(Frame* targetFrame) const
+{
+    // The navigation change is safe if the active frame is:
+    //   - in the same security origin as the target or one of the target's
+    //     ancestors.
+    //
+    // Or the target frame is:
+    //   - a top-level frame in the frame hierarchy and the active frame can
+    //     navigate the target frame's opener per above or it is the opener of
+    //     the target frame.
+
+    if (!targetFrame)
+        return true;
+
+    // Performance optimization.
+    if (m_frame == targetFrame)
+        return true;
+
+    // Let a frame navigate the top-level window that contains it.  This is
+    // important to allow because it lets a site "frame-bust" (escape from a
+    // frame created by another web site).
+    if (!isDocumentSandboxed(m_frame, SandboxTopNavigation) && targetFrame == m_frame->tree()->top())
+        return true;
+
+    // A sandboxed frame can only navigate itself and its descendants.
+    if (isDocumentSandboxed(m_frame, SandboxNavigation) && !targetFrame->tree()->isDescendantOf(m_frame))
+        return false;
+
+    // Let a frame navigate its opener if the opener is a top-level window.
+    if (!targetFrame->tree()->parent() && m_frame->loader()->opener() == targetFrame)
+        return true;
+
+    Document* activeDocument = m_frame->document();
+    ASSERT(activeDocument);
+    const SecurityOrigin* activeSecurityOrigin = activeDocument->securityOrigin();
+
+    // For top-level windows, check the opener.
+    if (!targetFrame->tree()->parent() && canAccessAncestor(activeSecurityOrigin, targetFrame->loader()->opener()))
+        return true;
+
+    // In general, check the frame's ancestors.
+    if (canAccessAncestor(activeSecurityOrigin, targetFrame))
+        return true;
+
+    Settings* settings = targetFrame->settings();
+    if (settings && !settings->privateBrowsingEnabled()) {
+        Document* targetDocument = targetFrame->document();
+        // FIXME: this error message should contain more specifics of why the navigation change is not allowed.
+        String message = makeString("Unsafe JavaScript attempt to initiate a navigation change for frame with URL ",
+                                    targetDocument->url().string(), " from frame with URL ", activeDocument->url().string(), ".\n");
+
+        // FIXME: should we print to the console of the activeFrame as well?
+        targetFrame->domWindow()->console()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, message, 1, String());
+    }
+    
+    return false;
+}
+
+void FrameLoader::stopLoadingSubframes()
+{
+    for (RefPtr<Frame> child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling())
+        child->loader()->stopAllLoaders();
+}
+
+void FrameLoader::stopAllLoaders(DatabasePolicy databasePolicy)
+{
+    ASSERT(!m_frame->document() || !m_frame->document()->inPageCache());
+    if (m_pageDismissalEventBeingDispatched)
+        return;
+
+    // If this method is called from within this method, infinite recursion can occur (3442218). Avoid this.
+    if (m_inStopAllLoaders)
+        return;
+
+    m_inStopAllLoaders = true;
+
+    policyChecker()->stopCheck();
+
+    stopLoadingSubframes();
+    if (m_provisionalDocumentLoader)
+        m_provisionalDocumentLoader->stopLoading(databasePolicy);
+    if (m_documentLoader)
+        m_documentLoader->stopLoading(databasePolicy);
+
+    setProvisionalDocumentLoader(0);
+    
+#if ENABLE(ARCHIVE) // ANDROID extension: disabled to reduce code size
+    if (m_documentLoader)
+        m_documentLoader->clearArchiveResources();
+#endif
+
+    m_checkTimer.stop();
+
+    m_inStopAllLoaders = false;    
+}
+
+void FrameLoader::stopForUserCancel(bool deferCheckLoadComplete)
+{
+    stopAllLoaders();
+    
+    if (deferCheckLoadComplete)
+        scheduleCheckLoadComplete();
+    else if (m_frame->page())
+        checkLoadComplete();
+}
+
+DocumentLoader* FrameLoader::activeDocumentLoader() const
+{
+    if (m_state == FrameStateProvisional)
+        return m_provisionalDocumentLoader.get();
+    return m_documentLoader.get();
+}
+
+bool FrameLoader::isLoading() const
+{
+    DocumentLoader* docLoader = activeDocumentLoader();
+    if (!docLoader)
+        return false;
+    return docLoader->isLoadingMainResource() || docLoader->isLoadingSubresources() || docLoader->isLoadingPlugIns();
+}
+
+bool FrameLoader::frameHasLoaded() const
+{
+    return m_stateMachine.committedFirstRealDocumentLoad() || (m_provisionalDocumentLoader && !m_stateMachine.creatingInitialEmptyDocument()); 
+}
+
+void FrameLoader::transferLoadingResourcesFromPage(Page* oldPage)
+{
+    ASSERT(oldPage != m_frame->page());
+    if (isLoading()) {
+        activeDocumentLoader()->transferLoadingResourcesFromPage(oldPage);
+        oldPage->progress()->progressCompleted(m_frame);
+        if (m_frame->page())
+            m_frame->page()->progress()->progressStarted(m_frame);
+    }
+}
+
+void FrameLoader::dispatchTransferLoadingResourceFromPage(unsigned long identifier, DocumentLoader* docLoader, const ResourceRequest& request, Page* oldPage)
+{
+    notifier()->dispatchTransferLoadingResourceFromPage(identifier, docLoader, request, oldPage);
+}
+
+void FrameLoader::setDocumentLoader(DocumentLoader* loader)
+{
+    if (!loader && !m_documentLoader)
+        return;
+    
+    ASSERT(loader != m_documentLoader);
+    ASSERT(!loader || loader->frameLoader() == this);
+
+    m_client->prepareForDataSourceReplacement();
+    detachChildren();
+    if (m_documentLoader)
+        m_documentLoader->detachFromFrame();
+
+    m_documentLoader = loader;
+}
+
+void FrameLoader::setPolicyDocumentLoader(DocumentLoader* loader)
+{
+    if (m_policyDocumentLoader == loader)
+        return;
+
+    ASSERT(m_frame);
+    if (loader)
+        loader->setFrame(m_frame);
+    if (m_policyDocumentLoader
+            && m_policyDocumentLoader != m_provisionalDocumentLoader
+            && m_policyDocumentLoader != m_documentLoader)
+        m_policyDocumentLoader->detachFromFrame();
+
+    m_policyDocumentLoader = loader;
+}
+
+void FrameLoader::setProvisionalDocumentLoader(DocumentLoader* loader)
+{
+    ASSERT(!loader || !m_provisionalDocumentLoader);
+    ASSERT(!loader || loader->frameLoader() == this);
+
+    if (m_provisionalDocumentLoader && m_provisionalDocumentLoader != m_documentLoader)
+        m_provisionalDocumentLoader->detachFromFrame();
+
+    m_provisionalDocumentLoader = loader;
+}
+
+double FrameLoader::timeOfLastCompletedLoad()
+{
+    return storedTimeOfLastCompletedLoad;
+}
+
+void FrameLoader::setState(FrameState newState)
+{    
+    m_state = newState;
+    
+    if (newState == FrameStateProvisional)
+        provisionalLoadStarted();
+    else if (newState == FrameStateComplete) {
+        frameLoadCompleted();
+        storedTimeOfLastCompletedLoad = currentTime();
+        if (m_documentLoader)
+            m_documentLoader->stopRecordingResponses();
+    }
+}
+
+void FrameLoader::clearProvisionalLoad()
+{
+    setProvisionalDocumentLoader(0);
+    if (Page* page = m_frame->page())
+        page->progress()->progressCompleted(m_frame);
+    setState(FrameStateComplete);
+}
+
+void FrameLoader::markLoadComplete()
+{
+    setState(FrameStateComplete);
+}
+
+void FrameLoader::commitProvisionalLoad()
+{
+    RefPtr<CachedPage> cachedPage = m_loadingFromCachedPage ? pageCache()->get(history()->provisionalItem()) : 0;
+    RefPtr<DocumentLoader> pdl = m_provisionalDocumentLoader;
+
+    LOG(PageCache, "WebCoreLoading %s: About to commit provisional load from previous URL '%s' to new URL '%s'", m_frame->tree()->uniqueName().string().utf8().data(), m_URL.string().utf8().data(), 
+        pdl ? pdl->url().string().utf8().data() : "<no provisional DocumentLoader>");
+
+    // Check to see if we need to cache the page we are navigating away from into the back/forward cache.
+    // We are doing this here because we know for sure that a new page is about to be loaded.
+    HistoryItem* item = history()->currentItem();
+    if (!m_frame->tree()->parent() && PageCache::canCache(m_frame->page()) && !item->isInPageCache())
+        pageCache()->add(item, m_frame->page());
+
+    if (m_loadType != FrameLoadTypeReplace)
+        closeOldDataSources();
+
+    if (!cachedPage && !m_stateMachine.creatingInitialEmptyDocument())
+        m_client->makeRepresentation(pdl.get());
+
+    transitionToCommitted(cachedPage);
+
+    if (pdl) {
+        // Check if the destination page is allowed to access the previous page's timing information.
+        RefPtr<SecurityOrigin> securityOrigin = SecurityOrigin::create(pdl->request().url());
+        m_documentLoader->timing()->hasSameOriginAsPreviousDocument = securityOrigin->canRequest(m_previousUrl);
+    }
+
+    // Call clientRedirectCancelledOrFinished() here so that the frame load delegate is notified that the redirect's
+    // status has changed, if there was a redirect.  The frame load delegate may have saved some state about
+    // the redirect in its -webView:willPerformClientRedirectToURL:delay:fireDate:forFrame:.  Since we are
+    // just about to commit a new page, there cannot possibly be a pending redirect at this point.
+    if (m_sentRedirectNotification)
+        clientRedirectCancelledOrFinished(false);
+    
+    if (cachedPage && cachedPage->document()) {
+        prepareForCachedPageRestore();
+        cachedPage->restore(m_frame->page());
+
+        dispatchDidCommitLoad();
+
+        // If we have a title let the WebView know about it. 
+        String title = m_documentLoader->title();
+        if (!title.isNull()) 
+            m_client->dispatchDidReceiveTitle(title);         
+
+        checkCompleted();
+    } else {        
+        KURL url = pdl->substituteData().responseURL();
+        if (url.isEmpty())
+            url = pdl->url();
+        if (url.isEmpty())
+            url = pdl->responseURL();
+        if (url.isEmpty())
+            url = blankURL();
+
+        didOpenURL(url);
+    }
+
+    LOG(Loading, "WebCoreLoading %s: Finished committing provisional load to URL %s", m_frame->tree()->uniqueName().string().utf8().data(), m_URL.string().utf8().data());
+
+    if (m_loadType == FrameLoadTypeStandard && m_documentLoader->isClientRedirect())
+        history()->updateForClientRedirect();
+
+    if (m_loadingFromCachedPage) {
+        m_frame->document()->documentDidBecomeActive();
+        
+        // Force a layout to update view size and thereby update scrollbars.
+        m_frame->view()->forceLayout();
+
+        const ResponseVector& responses = m_documentLoader->responses();
+        size_t count = responses.size();
+        for (size_t i = 0; i < count; i++) {
+            const ResourceResponse& response = responses[i];
+            // FIXME: If the WebKit client changes or cancels the request, this is not respected.
+            ResourceError error;
+            unsigned long identifier;
+            ResourceRequest request(response.url());
+            requestFromDelegate(request, identifier, error);
+            // FIXME: If we get a resource with more than 2B bytes, this code won't do the right thing.
+            // However, with today's computers and networking speeds, this won't happen in practice.
+            // Could be an issue with a giant local file.
+            notifier()->sendRemainingDelegateMessages(m_documentLoader.get(), identifier, response, static_cast<int>(response.expectedContentLength()), error);
+        }
+        
+        pageCache()->remove(history()->currentItem());
+
+        m_documentLoader->setPrimaryLoadComplete(true);
+
+        // FIXME: Why only this frame and not parent frames?
+        checkLoadCompleteForThisFrame();
+    }
+}
+
+void FrameLoader::transitionToCommitted(PassRefPtr<CachedPage> cachedPage)
+{
+    ASSERT(m_client->hasWebView());
+    ASSERT(m_state == FrameStateProvisional);
+
+    if (m_state != FrameStateProvisional)
+        return;
+
+    m_client->setCopiesOnScroll();
+    history()->updateForCommit();
+
+    // The call to closeURL() invokes the unload event handler, which can execute arbitrary
+    // JavaScript. If the script initiates a new load, we need to abandon the current load,
+    // or the two will stomp each other.
+    DocumentLoader* pdl = m_provisionalDocumentLoader.get();
+    if (m_documentLoader)
+        closeURL();
+    if (pdl != m_provisionalDocumentLoader)
+        return;
+
+    // Nothing else can interupt this commit - set the Provisional->Committed transition in stone
+    if (m_documentLoader)
+        m_documentLoader->stopLoadingSubresources();
+    if (m_documentLoader)
+        m_documentLoader->stopLoadingPlugIns();
+
+    setDocumentLoader(m_provisionalDocumentLoader.get());
+    setProvisionalDocumentLoader(0);
+    setState(FrameStateCommittedPage);
+
+    // Handle adding the URL to the back/forward list.
+    DocumentLoader* dl = m_documentLoader.get();
+
+    switch (m_loadType) {
+        case FrameLoadTypeForward:
+        case FrameLoadTypeBack:
+        case FrameLoadTypeBackWMLDeckNotAccessible:
+        case FrameLoadTypeIndexedBackForward:
+            if (m_frame->page()) {
+                // If the first load within a frame is a navigation within a back/forward list that was attached
+                // without any of the items being loaded then we need to update the history in a similar manner as
+                // for a standard load with the exception of updating the back/forward list (<rdar://problem/8091103>).
+                if (!m_stateMachine.committedFirstRealDocumentLoad())
+                    history()->updateForStandardLoad(HistoryController::UpdateAllExceptBackForwardList);
+
+                history()->updateForBackForwardNavigation();
+
+                // For cached pages, CachedFrame::restore will take care of firing the popstate event with the history item's state object
+                if (history()->currentItem() && !cachedPage)
+                    m_pendingStateObject = history()->currentItem()->stateObject();
+
+                // Create a document view for this document, or used the cached view.
+                if (cachedPage) {
+                    DocumentLoader* cachedDocumentLoader = cachedPage->documentLoader();
+                    ASSERT(cachedDocumentLoader);
+                    cachedDocumentLoader->setFrame(m_frame);
+                    m_client->transitionToCommittedFromCachedFrame(cachedPage->cachedMainFrame());
+
+                } else
+                    m_client->transitionToCommittedForNewPage();
+            }
+            break;
+
+        case FrameLoadTypeReload:
+        case FrameLoadTypeReloadFromOrigin:
+        case FrameLoadTypeSame:
+        case FrameLoadTypeReplace:
+            history()->updateForReload();
+            m_client->transitionToCommittedForNewPage();
+            break;
+
+        case FrameLoadTypeStandard:
+            history()->updateForStandardLoad();
+#ifndef BUILDING_ON_TIGER
+            // This code was originally added for a Leopard performance imporvement. We decided to 
+            // ifdef it to fix correctness issues on Tiger documented in <rdar://problem/5441823>.
+            if (m_frame->view())
+                m_frame->view()->setScrollbarsSuppressed(true);
+#endif
+            m_client->transitionToCommittedForNewPage();
+            break;
+
+        case FrameLoadTypeRedirectWithLockedBackForwardList:
+            history()->updateForRedirectWithLockedBackForwardList();
+            m_client->transitionToCommittedForNewPage();
+            break;
+
+        // FIXME Remove this check when dummy ds is removed (whatever "dummy ds" is).
+        // An exception should be thrown if we're in the FrameLoadTypeUninitialized state.
+        default:
+            ASSERT_NOT_REACHED();
+    }
+
+    writer()->setMIMEType(dl->responseMIMEType());
+
+    // Tell the client we've committed this URL.
+    ASSERT(m_frame->view());
+
+    if (m_stateMachine.creatingInitialEmptyDocument())
+        return;
+
+    if (!m_stateMachine.committedFirstRealDocumentLoad())
+        m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocumentPostCommit);
+
+    if (!m_client->hasHTMLView())
+        receivedFirstData();
+}
+
+void FrameLoader::clientRedirectCancelledOrFinished(bool cancelWithLoadInProgress)
+{
+    // Note that -webView:didCancelClientRedirectForFrame: is called on the frame load delegate even if
+    // the redirect succeeded.  We should either rename this API, or add a new method, like
+    // -webView:didFinishClientRedirectForFrame:
+    m_client->dispatchDidCancelClientRedirect();
+
+    if (!cancelWithLoadInProgress)
+        m_quickRedirectComing = false;
+
+    m_sentRedirectNotification = false;
+}
+
+void FrameLoader::clientRedirected(const KURL& url, double seconds, double fireDate, bool lockBackForwardList)
+{
+    m_client->dispatchWillPerformClientRedirect(url, seconds, fireDate);
+    
+    // Remember that we sent a redirect notification to the frame load delegate so that when we commit
+    // the next provisional load, we can send a corresponding -webView:didCancelClientRedirectForFrame:
+    m_sentRedirectNotification = true;
+    
+    // If a "quick" redirect comes in, we set a special mode so we treat the next
+    // load as part of the original navigation. If we don't have a document loader, we have
+    // no "original" load on which to base a redirect, so we treat the redirect as a normal load.
+    // Loads triggered by JavaScript form submissions never count as quick redirects.
+    m_quickRedirectComing = (lockBackForwardList || history()->currentItemShouldBeReplaced()) && m_documentLoader && !m_isExecutingJavaScriptFormAction;
+}
+
+bool FrameLoader::shouldReload(const KURL& currentURL, const KURL& destinationURL)
+{
+#if ENABLE(WML)
+    // All WML decks are supposed to be reloaded, even within the same URL fragment
+    if (frameContainsWMLContent(m_frame))
+        return true;
+#endif
+
+    // This function implements the rule: "Don't reload if navigating by fragment within
+    // the same URL, but do reload if going to a new URL or to the same URL with no
+    // fragment identifier at all."
+    if (!destinationURL.hasFragmentIdentifier())
+        return true;
+    return !equalIgnoringFragmentIdentifier(currentURL, destinationURL);
+}
+
+void FrameLoader::closeOldDataSources()
+{
+    // FIXME: Is it important for this traversal to be postorder instead of preorder?
+    // If so, add helpers for postorder traversal, and use them. If not, then lets not
+    // use a recursive algorithm here.
+    for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling())
+        child->loader()->closeOldDataSources();
+    
+    if (m_documentLoader)
+        m_client->dispatchWillClose();
+
+    m_client->setMainFrameDocumentReady(false); // stop giving out the actual DOMDocument to observers
+}
+
+void FrameLoader::prepareForCachedPageRestore()
+{
+    ASSERT(!m_frame->tree()->parent());
+    ASSERT(m_frame->page());
+    ASSERT(m_frame->page()->mainFrame() == m_frame);
+
+    m_frame->navigationScheduler()->cancel();
+
+    // We still have to close the previous part page.
+    closeURL();
+    
+    // Delete old status bar messages (if it _was_ activated on last URL).
+    if (m_frame->script()->canExecuteScripts(NotAboutToExecuteScript)) {
+        if (DOMWindow* window = m_frame->existingDOMWindow()) {
+            window->setStatus(String());
+            window->setDefaultStatus(String());
+        }
+    }
+}
+
+void FrameLoader::open(CachedFrameBase& cachedFrame)
+{
+    m_isComplete = false;
+    
+    // Don't re-emit the load event.
+    m_didCallImplicitClose = true;
+
+    KURL url = cachedFrame.url();
+
+    if (url.protocolInHTTPFamily() && !url.host().isEmpty() && url.path().isEmpty())
+        url.setPath("/");
+    
+    m_URL = url;
+    m_workingURL = url;
+
+    started();
+    clear(true, true, cachedFrame.isMainFrame());
+
+    Document* document = cachedFrame.document();
+    ASSERT(document);
+    document->setInPageCache(false);
+
+    m_needsClear = true;
+    m_isComplete = false;
+    m_didCallImplicitClose = false;
+    m_outgoingReferrer = url.string();
+
+    FrameView* view = cachedFrame.view();
+    
+    // When navigating to a CachedFrame its FrameView should never be null.  If it is we'll crash in creative ways downstream.
+    ASSERT(view);
+    view->setWasScrolledByUser(false);
+
+    // Use the current ScrollView's frame rect.
+    if (m_frame->view())
+        view->setFrameRect(m_frame->view()->frameRect());
+    m_frame->setView(view);
+    
+    m_frame->setDocument(document);
+    m_frame->setDOMWindow(cachedFrame.domWindow());
+    m_frame->domWindow()->setURL(document->url());
+    m_frame->domWindow()->setSecurityOrigin(document->securityOrigin());
+
+    writer()->setDecoder(document->decoder());
+
+    updateFirstPartyForCookies();
+
+    cachedFrame.restore();
+}
+
+bool FrameLoader::isStopping() const
+{
+    return activeDocumentLoader()->isStopping();
+}
+
+void FrameLoader::finishedLoading()
+{
+    // Retain because the stop may release the last reference to it.
+    RefPtr<Frame> protect(m_frame);
+
+    RefPtr<DocumentLoader> dl = activeDocumentLoader();
+    dl->finishedLoading();
+    if (!dl->mainDocumentError().isNull() || !dl->frameLoader())
+        return;
+    dl->setPrimaryLoadComplete(true);
+    m_client->dispatchDidLoadMainResource(dl.get());
+    checkLoadComplete();
+}
+
+bool FrameLoader::isHostedByObjectElement() const
+{
+    HTMLFrameOwnerElement* owner = m_frame->ownerElement();
+    return owner && owner->hasTagName(objectTag);
+}
+
+bool FrameLoader::isLoadingMainFrame() const
+{
+    Page* page = m_frame->page();
+    return page && m_frame == page->mainFrame();
+}
+
+bool FrameLoader::canShowMIMEType(const String& MIMEType) const
+{
+    return m_client->canShowMIMEType(MIMEType);
+}
+
+bool FrameLoader::representationExistsForURLScheme(const String& URLScheme)
+{
+    return m_client->representationExistsForURLScheme(URLScheme);
+}
+
+String FrameLoader::generatedMIMETypeForURLScheme(const String& URLScheme)
+{
+    return m_client->generatedMIMETypeForURLScheme(URLScheme);
+}
+
+void FrameLoader::didReceiveServerRedirectForProvisionalLoadForFrame()
+{
+    m_client->dispatchDidReceiveServerRedirectForProvisionalLoad();
+}
+
+void FrameLoader::finishedLoadingDocument(DocumentLoader* loader)
+{
+    // FIXME: Platforms shouldn't differ here!
+#if PLATFORM(WIN) || PLATFORM(CHROMIUM) || defined(ANDROID)
+    if (m_stateMachine.creatingInitialEmptyDocument())
+        return;
+#endif
+    
+#if ENABLE(ARCHIVE) // ANDROID extension: disabled to reduce code size
+
+    // Give archive machinery a crack at this document. If the MIME type is not an archive type, it will return 0.
+    RefPtr<Archive> archive = ArchiveFactory::create(loader->mainResourceData().get(), loader->responseMIMEType());
+    if (!archive) {
+        m_client->finishedLoading(loader);
+        return;
+    }
+
+    // FIXME: The remainder of this function should be moved to DocumentLoader.
+
+    loader->addAllArchiveResources(archive.get());
+
+    ArchiveResource* mainResource = archive->mainResource();
+    loader->setParsedArchiveData(mainResource->data());
+
+    writer()->setMIMEType(mainResource->mimeType());
+
+    closeURL();
+    didOpenURL(mainResource->url());
+
+    ASSERT(m_frame->document());
+    String userChosenEncoding = documentLoader()->overrideEncoding();
+    bool encodingIsUserChosen = !userChosenEncoding.isNull();
+    writer()->setEncoding(encodingIsUserChosen ? userChosenEncoding : mainResource->textEncoding(), encodingIsUserChosen);
+    writer()->addData(mainResource->data()->data(), mainResource->data()->size());
+#else
+    m_client->finishedLoading(loader);
+#endif // ARCHIVE
+}
+
+bool FrameLoader::isReplacing() const
+{
+    return m_loadType == FrameLoadTypeReplace;
+}
+
+void FrameLoader::setReplacing()
+{
+    m_loadType = FrameLoadTypeReplace;
+}
+
+void FrameLoader::revertToProvisional(DocumentLoader* loader)
+{
+    m_client->revertToProvisionalState(loader);
+}
+
+bool FrameLoader::subframeIsLoading() const
+{
+    // It's most likely that the last added frame is the last to load so we walk backwards.
+    for (Frame* child = m_frame->tree()->lastChild(); child; child = child->tree()->previousSibling()) {
+        FrameLoader* childLoader = child->loader();
+        DocumentLoader* documentLoader = childLoader->documentLoader();
+        if (documentLoader && documentLoader->isLoadingInAPISense())
+            return true;
+        documentLoader = childLoader->provisionalDocumentLoader();
+        if (documentLoader && documentLoader->isLoadingInAPISense())
+            return true;
+        documentLoader = childLoader->policyDocumentLoader();
+        if (documentLoader)
+            return true;
+    }
+    return false;
+}
+
+void FrameLoader::willChangeTitle(DocumentLoader* loader)
+{
+    m_client->willChangeTitle(loader);
+}
+
+FrameLoadType FrameLoader::loadType() const
+{
+    return m_loadType;
+}
+    
+CachePolicy FrameLoader::subresourceCachePolicy() const
+{
+    if (m_isComplete)
+        return CachePolicyVerify;
+
+    if (m_loadType == FrameLoadTypeReloadFromOrigin)
+        return CachePolicyReload;
+
+    if (Frame* parentFrame = m_frame->tree()->parent()) {
+        CachePolicy parentCachePolicy = parentFrame->loader()->subresourceCachePolicy();
+        if (parentCachePolicy != CachePolicyVerify)
+            return parentCachePolicy;
+    }
+
+    // FIXME: POST documents are always Reloads, but their subresources should still be Revalidate.
+    // If we bring the CachePolicy.h and ResourceRequest cache policy enums in sync with each other and
+    // remember "Revalidate" in ResourceRequests, we can remove this "POST" check and return either "Reload" 
+    // or "Revalidate" if the DocumentLoader was requested with either.
+    const ResourceRequest& request(documentLoader()->request());
+    if (request.cachePolicy() == ReloadIgnoringCacheData && !equalIgnoringCase(request.httpMethod(), "post"))
+        return CachePolicyRevalidate;
+
+    if (m_loadType == FrameLoadTypeReload)
+        return CachePolicyRevalidate;
+
+    if (request.cachePolicy() == ReturnCacheDataElseLoad)
+        return CachePolicyHistoryBuffer;
+
+    return CachePolicyVerify;
+}
+
+void FrameLoader::checkLoadCompleteForThisFrame()
+{
+    ASSERT(m_client->hasWebView());
+
+    switch (m_state) {
+        case FrameStateProvisional: {
+            if (m_delegateIsHandlingProvisionalLoadError)
+                return;
+
+            RefPtr<DocumentLoader> pdl = m_provisionalDocumentLoader;
+            if (!pdl)
+                return;
+                
+            // If we've received any errors we may be stuck in the provisional state and actually complete.
+            const ResourceError& error = pdl->mainDocumentError();
+            if (error.isNull())
+                return;
+
+            // Check all children first.
+            RefPtr<HistoryItem> item;
+            if (Page* page = m_frame->page())
+                if (isBackForwardLoadType(loadType()) && m_frame == page->mainFrame())
+                    item = history()->currentItem();
+                
+            bool shouldReset = true;
+            if (!(pdl->isLoadingInAPISense() && !pdl->isStopping())) {
+                m_delegateIsHandlingProvisionalLoadError = true;
+                m_client->dispatchDidFailProvisionalLoad(error);
+                m_delegateIsHandlingProvisionalLoadError = false;
+
+                // FIXME: can stopping loading here possibly have any effect, if isLoading is false,
+                // which it must be to be in this branch of the if? And is it OK to just do a full-on
+                // stopAllLoaders instead of stopLoadingSubframes?
+                stopLoadingSubframes();
+                pdl->stopLoading();
+
+                // If we're in the middle of loading multipart data, we need to restore the document loader.
+                if (isReplacing() && !m_documentLoader.get())
+                    setDocumentLoader(m_provisionalDocumentLoader.get());
+
+                // Finish resetting the load state, but only if another load hasn't been started by the
+                // delegate callback.
+                if (pdl == m_provisionalDocumentLoader)
+                    clearProvisionalLoad();
+                else if (activeDocumentLoader()) {
+                    KURL unreachableURL = activeDocumentLoader()->unreachableURL();
+                    if (!unreachableURL.isEmpty() && unreachableURL == pdl->request().url())
+                        shouldReset = false;
+                }
+            }
+            if (shouldReset && item)
+                if (Page* page = m_frame->page()) {
+                    page->backForward()->setCurrentItem(item.get());
+                    Settings* settings = m_frame->settings();
+                    page->setGlobalHistoryItem((!settings || settings->privateBrowsingEnabled()) ? 0 : item.get());
+                }
+            return;
+        }
+        
+        case FrameStateCommittedPage: {
+            DocumentLoader* dl = m_documentLoader.get();            
+            if (!dl || (dl->isLoadingInAPISense() && !dl->isStopping()))
+                return;
+
+            markLoadComplete();
+
+            // FIXME: Is this subsequent work important if we already navigated away?
+            // Maybe there are bugs because of that, or extra work we can skip because
+            // the new page is ready.
+
+            m_client->forceLayoutForNonHTML();
+             
+            // If the user had a scroll point, scroll to it, overriding the anchor point if any.
+            if (m_frame->page()) {
+                if (isBackForwardLoadType(m_loadType) || m_loadType == FrameLoadTypeReload || m_loadType == FrameLoadTypeReloadFromOrigin)
+                    history()->restoreScrollPositionAndViewState();
+            }
+
+            if (m_stateMachine.creatingInitialEmptyDocument() || !m_stateMachine.committedFirstRealDocumentLoad())
+                return;
+
+            const ResourceError& error = dl->mainDocumentError();
+            if (!error.isNull())
+                m_client->dispatchDidFailLoad(error);
+            else
+                m_client->dispatchDidFinishLoad();
+
+            if (Page* page = m_frame->page())
+                page->progress()->progressCompleted(m_frame);
+
+#ifdef ANDROID_INSTRUMENT
+            if (!m_frame->tree()->parent() && m_frame->document()->renderArena())
+                android::TimeCounter::report(m_URL, cache()->getLiveSize(), cache()->getDeadSize(),
+                        m_frame->document()->renderArena()->reportPoolSize());
+#endif
+            return;
+        }
+        
+        case FrameStateComplete:
+            frameLoadCompleted();
+            return;
+    }
+
+    ASSERT_NOT_REACHED();
+}
+
+void FrameLoader::continueLoadAfterWillSubmitForm()
+{
+    if (!m_provisionalDocumentLoader)
+        return;
+
+    // DocumentLoader calls back to our prepareForLoadStart
+    m_provisionalDocumentLoader->prepareForLoadStart();
+    
+    // The load might be cancelled inside of prepareForLoadStart(), nulling out the m_provisionalDocumentLoader, 
+    // so we need to null check it again.
+    if (!m_provisionalDocumentLoader)
+        return;
+
+    DocumentLoader* activeDocLoader = activeDocumentLoader();
+    if (activeDocLoader && activeDocLoader->isLoadingMainResource())
+        return;
+
+    m_loadingFromCachedPage = false;
+
+    unsigned long identifier = 0;
+
+    if (Page* page = m_frame->page()) {
+        identifier = page->progress()->createUniqueIdentifier();
+        notifier()->assignIdentifierToInitialRequest(identifier, m_provisionalDocumentLoader.get(), m_provisionalDocumentLoader->originalRequest());
+    }
+
+    ASSERT(!m_provisionalDocumentLoader->timing()->navigationStart);
+    m_provisionalDocumentLoader->timing()->navigationStart = currentTime();
+
+    if (!m_provisionalDocumentLoader->startLoadingMainResource(identifier))
+        m_provisionalDocumentLoader->updateLoading();
+}
+
+void FrameLoader::didFirstLayout()
+{
+    if (m_frame->page() && isBackForwardLoadType(m_loadType))
+        history()->restoreScrollPositionAndViewState();
+
+    if (m_stateMachine.committedFirstRealDocumentLoad() && !m_stateMachine.isDisplayingInitialEmptyDocument() && !m_stateMachine.firstLayoutDone())
+        m_stateMachine.advanceTo(FrameLoaderStateMachine::FirstLayoutDone);
+    m_client->dispatchDidFirstLayout();
+}
+
+void FrameLoader::didFirstVisuallyNonEmptyLayout()
+{
+    m_client->dispatchDidFirstVisuallyNonEmptyLayout();
+}
+
+void FrameLoader::frameLoadCompleted()
+{
+    // Note: Can be called multiple times.
+
+    m_client->frameLoadCompleted();
+
+    history()->updateForFrameLoadCompleted();
+
+    // After a canceled provisional load, firstLayoutDone is false.
+    // Reset it to true if we're displaying a page.
+    if (m_documentLoader && m_stateMachine.committedFirstRealDocumentLoad() && !m_stateMachine.isDisplayingInitialEmptyDocument() && !m_stateMachine.firstLayoutDone())
+        m_stateMachine.advanceTo(FrameLoaderStateMachine::FirstLayoutDone);
+}
+
+void FrameLoader::detachChildren()
+{
+    // FIXME: Is it really necessary to do this in reverse order?
+    Frame* previous;
+    for (Frame* child = m_frame->tree()->lastChild(); child; child = previous) {
+        previous = child->tree()->previousSibling();
+        child->loader()->detachFromParent();
+    }
+}
+
+void FrameLoader::closeAndRemoveChild(Frame* child)
+{
+    child->tree()->detachFromParent();
+
+    child->setView(0);
+    if (child->ownerElement() && child->page())
+        child->page()->decrementFrameCount();
+    // FIXME: The page isn't being destroyed, so it's not right to call a function named pageDestroyed().
+    child->pageDestroyed();
+
+    m_frame->tree()->removeChild(child);
+}
+
+void FrameLoader::recursiveCheckLoadComplete()
+{
+    Vector<RefPtr<Frame>, 10> frames;
+    
+    for (RefPtr<Frame> frame = m_frame->tree()->firstChild(); frame; frame = frame->tree()->nextSibling())
+        frames.append(frame);
+    
+    unsigned size = frames.size();
+    for (unsigned i = 0; i < size; i++)
+        frames[i]->loader()->recursiveCheckLoadComplete();
+    
+    checkLoadCompleteForThisFrame();
+}
+
+// Called every time a resource is completely loaded, or an error is received.
+void FrameLoader::checkLoadComplete()
+{
+    ASSERT(m_client->hasWebView());
+    
+    m_shouldCallCheckLoadComplete = false;
+
+    // FIXME: Always traversing the entire frame tree is a bit inefficient, but 
+    // is currently needed in order to null out the previous history item for all frames.
+    if (Page* page = m_frame->page())
+        page->mainFrame()->loader()->recursiveCheckLoadComplete();
+}
+
+int FrameLoader::numPendingOrLoadingRequests(bool recurse) const
+{
+    if (!recurse)
+        return numRequests(m_frame->document());
+
+    int count = 0;
+    for (Frame* frame = m_frame; frame; frame = frame->tree()->traverseNext(m_frame))
+        count += numRequests(frame->document());
+    return count;
+}
+
+String FrameLoader::userAgent(const KURL& url) const
+{
+    return m_client->userAgent(url);
+}
+
+void FrameLoader::handledOnloadEvents()
+{
+    m_client->dispatchDidHandleOnloadEvents();
+
+    if (documentLoader()) {
+        documentLoader()->handledOnloadEvents();
+#if ENABLE(OFFLINE_WEB_APPLICATIONS)
+        documentLoader()->applicationCacheHost()->stopDeferringEvents();
+#endif
+    }
+}
+
+void FrameLoader::frameDetached()
+{
+    stopAllLoaders();
+    m_frame->document()->stopActiveDOMObjects();
+    detachFromParent();
+}
+
+void FrameLoader::detachFromParent()
+{
+    RefPtr<Frame> protect(m_frame);
+
+    closeURL();
+    history()->saveScrollPositionAndViewStateToItem(history()->currentItem());
+    detachChildren();
+    // stopAllLoaders() needs to be called after detachChildren(), because detachedChildren()
+    // will trigger the unload event handlers of any child frames, and those event
+    // handlers might start a new subresource load in this frame.
+    stopAllLoaders();
+
+#if ENABLE(INSPECTOR)
+    if (Page* page = m_frame->page())
+        page->inspectorController()->frameDetachedFromParent(m_frame);
+#endif
+
+    detachViewsAndDocumentLoader();
+
+    if (Frame* parent = m_frame->tree()->parent()) {
+        parent->loader()->closeAndRemoveChild(m_frame);
+        parent->loader()->scheduleCheckCompleted();
+    } else {
+        m_frame->setView(0);
+        // FIXME: The page isn't being destroyed, so it's not right to call a function named pageDestroyed().
+        m_frame->pageDestroyed();
+    }
+}
+
+void FrameLoader::detachViewsAndDocumentLoader()
+{
+    m_client->detachedFromParent2();
+    setDocumentLoader(0);
+    m_client->detachedFromParent3();
+}
+    
+void FrameLoader::addExtraFieldsToSubresourceRequest(ResourceRequest& request)
+{
+    addExtraFieldsToRequest(request, m_loadType, false, false);
+}
+
+void FrameLoader::addExtraFieldsToMainResourceRequest(ResourceRequest& request)
+{
+    addExtraFieldsToRequest(request, m_loadType, true, false);
+}
+
+void FrameLoader::addExtraFieldsToRequest(ResourceRequest& request, FrameLoadType loadType, bool mainResource, bool cookiePolicyURLFromRequest)
+{
+    // Don't set the cookie policy URL if it's already been set.
+    // But make sure to set it on all requests, as it has significance beyond the cookie policy for all protocols (<rdar://problem/6616664>).
+    if (request.firstPartyForCookies().isEmpty()) {
+        if (mainResource && (isLoadingMainFrame() || cookiePolicyURLFromRequest))
+            request.setFirstPartyForCookies(request.url());
+        else if (Document* document = m_frame->document())
+            request.setFirstPartyForCookies(document->firstPartyForCookies());
+    }
+
+    // The remaining modifications are only necessary for HTTP and HTTPS.
+    if (!request.url().isEmpty() && !request.url().protocolInHTTPFamily())
+        return;
+
+    applyUserAgent(request);
+    
+    // If we inherit cache policy from a main resource, we use the DocumentLoader's 
+    // original request cache policy for two reasons:
+    // 1. For POST requests, we mutate the cache policy for the main resource,
+    //    but we do not want this to apply to subresources
+    // 2. Delegates that modify the cache policy using willSendRequest: should
+    //    not affect any other resources. Such changes need to be done
+    //    per request.
+    if (!mainResource) {
+        if (request.isConditional())
+            request.setCachePolicy(ReloadIgnoringCacheData);
+        else if (documentLoader()->isLoadingInAPISense())
+            request.setCachePolicy(documentLoader()->originalRequest().cachePolicy());
+        else
+            request.setCachePolicy(UseProtocolCachePolicy);
+    } else if (loadType == FrameLoadTypeReload || loadType == FrameLoadTypeReloadFromOrigin || request.isConditional())
+        request.setCachePolicy(ReloadIgnoringCacheData);
+    else if (isBackForwardLoadType(loadType) && m_stateMachine.committedFirstRealDocumentLoad() && !request.url().protocolIs("https"))
+        request.setCachePolicy(ReturnCacheDataElseLoad);
+        
+    if (request.cachePolicy() == ReloadIgnoringCacheData) {
+        if (loadType == FrameLoadTypeReload)
+            request.setHTTPHeaderField("Cache-Control", "max-age=0");
+        else if (loadType == FrameLoadTypeReloadFromOrigin) {
+            request.setHTTPHeaderField("Cache-Control", "no-cache");
+            request.setHTTPHeaderField("Pragma", "no-cache");
+        }
+    }
+    
+    if (mainResource)
+        request.setHTTPAccept(defaultAcceptHeader);
+
+    // Make sure we send the Origin header.
+    addHTTPOriginIfNeeded(request, String());
+
+    // Always try UTF-8. If that fails, try frame encoding (if any) and then the default.
+    // For a newly opened frame with an empty URL, encoding() should not be used, because this methods asks decoder, which uses ISO-8859-1.
+    Settings* settings = m_frame->settings();
+    request.setResponseContentDispositionEncodingFallbackArray("UTF-8", writer()->deprecatedFrameEncoding(), settings ? settings->defaultTextEncodingName() : String());
+}
+
+void FrameLoader::addHTTPOriginIfNeeded(ResourceRequest& request, String origin)
+{
+    if (!request.httpOrigin().isEmpty())
+        return;  // Request already has an Origin header.
+
+    // Don't send an Origin header for GET or HEAD to avoid privacy issues.
+    // For example, if an intranet page has a hyperlink to an external web
+    // site, we don't want to include the Origin of the request because it
+    // will leak the internal host name. Similar privacy concerns have lead
+    // to the widespread suppression of the Referer header at the network
+    // layer.
+    if (request.httpMethod() == "GET" || request.httpMethod() == "HEAD")
+        return;
+
+    // For non-GET and non-HEAD methods, always send an Origin header so the
+    // server knows we support this feature.
+
+    if (origin.isEmpty()) {
+        // If we don't know what origin header to attach, we attach the value
+        // for an empty origin.
+        origin = SecurityOrigin::createEmpty()->toString();
+    }
+
+    request.setHTTPOrigin(origin);
+}
+
+void FrameLoader::loadPostRequest(const ResourceRequest& inRequest, const String& referrer, const String& frameName, bool lockHistory, FrameLoadType loadType, PassRefPtr<Event> event, PassRefPtr<FormState> prpFormState)
+{
+    RefPtr<FormState> formState = prpFormState;
+
+    // When posting, use the NSURLRequestReloadIgnoringCacheData load flag.
+    // This prevents a potential bug which may cause a page with a form that uses itself
+    // as an action to be returned from the cache without submitting.
+
+    // FIXME: Where's the code that implements what the comment above says?
+
+    // Previously when this method was reached, the original FrameLoadRequest had been deconstructed to build a 
+    // bunch of parameters that would come in here and then be built back up to a ResourceRequest.  In case
+    // any caller depends on the immutability of the original ResourceRequest, I'm rebuilding a ResourceRequest
+    // from scratch as it did all along.
+    const KURL& url = inRequest.url();
+    RefPtr<FormData> formData = inRequest.httpBody();
+    const String& contentType = inRequest.httpContentType();
+    String origin = inRequest.httpOrigin();
+
+    ResourceRequest workingResourceRequest(url);    
+
+    if (!referrer.isEmpty())
+        workingResourceRequest.setHTTPReferrer(referrer);
+    workingResourceRequest.setHTTPOrigin(origin);
+    workingResourceRequest.setHTTPMethod("POST");
+    workingResourceRequest.setHTTPBody(formData);
+    workingResourceRequest.setHTTPContentType(contentType);
+    addExtraFieldsToRequest(workingResourceRequest, loadType, true, true);
+
+    NavigationAction action(url, loadType, true, event);
+
+    if (!frameName.isEmpty()) {
+        // The search for a target frame is done earlier in the case of form submission.
+        if (Frame* targetFrame = formState ? 0 : findFrameForNavigation(frameName))
+            targetFrame->loader()->loadWithNavigationAction(workingResourceRequest, action, lockHistory, loadType, formState.release());
+        else
+            policyChecker()->checkNewWindowPolicy(action, FrameLoader::callContinueLoadAfterNewWindowPolicy, workingResourceRequest, formState.release(), frameName, this);
+    } else
+        loadWithNavigationAction(workingResourceRequest, action, lockHistory, loadType, formState.release());    
+}
+
+unsigned long FrameLoader::loadResourceSynchronously(const ResourceRequest& request, StoredCredentials storedCredentials, ResourceError& error, ResourceResponse& response, Vector<char>& data)
+{
+    String referrer = m_outgoingReferrer;
+    if (SecurityOrigin::shouldHideReferrer(request.url(), referrer))
+        referrer = String();
+    
+    ResourceRequest initialRequest = request;
+    initialRequest.setTimeoutInterval(10);
+    
+    if (!referrer.isEmpty())
+        initialRequest.setHTTPReferrer(referrer);
+    addHTTPOriginIfNeeded(initialRequest, outgoingOrigin());
+
+    if (Page* page = m_frame->page())
+        initialRequest.setFirstPartyForCookies(page->mainFrame()->loader()->documentLoader()->request().url());
+    initialRequest.setHTTPUserAgent(client()->userAgent(request.url()));
+    
+    addExtraFieldsToSubresourceRequest(initialRequest);
+
+    unsigned long identifier = 0;    
+    ResourceRequest newRequest(initialRequest);
+    requestFromDelegate(newRequest, identifier, error);
+
+    if (error.isNull()) {
+        ASSERT(!newRequest.isNull());
+        
+#if ENABLE(OFFLINE_WEB_APPLICATIONS)
+        if (!documentLoader()->applicationCacheHost()->maybeLoadSynchronously(newRequest, error, response, data)) {
+#endif
+            ResourceHandle::loadResourceSynchronously(networkingContext(), newRequest, storedCredentials, error, response, data);
+#if ENABLE(OFFLINE_WEB_APPLICATIONS)
+            documentLoader()->applicationCacheHost()->maybeLoadFallbackSynchronously(newRequest, error, response, data);
+        }
+#endif
+    }
+
+    notifier()->sendRemainingDelegateMessages(m_documentLoader.get(), identifier, response, data.size(), error);
+    return identifier;
+}
+
+const ResourceRequest& FrameLoader::originalRequest() const
+{
+    return activeDocumentLoader()->originalRequestCopy();
+}
+
+void FrameLoader::receivedMainResourceError(const ResourceError& error, bool isComplete)
+{
+    // Retain because the stop may release the last reference to it.
+    RefPtr<Frame> protect(m_frame);
+
+    RefPtr<DocumentLoader> loader = activeDocumentLoader();
+
+    if (isComplete) {
+        // FIXME: Don't want to do this if an entirely new load is going, so should check
+        // that both data sources on the frame are either this or nil.
+        stop();
+        if (m_client->shouldFallBack(error))
+            handleFallbackContent();
+    }
+
+    if (m_state == FrameStateProvisional && m_provisionalDocumentLoader) {
+        if (m_submittedFormURL == m_provisionalDocumentLoader->originalRequestCopy().url())
+            m_submittedFormURL = KURL();
+            
+        // We might have made a page cache item, but now we're bailing out due to an error before we ever
+        // transitioned to the new page (before WebFrameState == commit).  The goal here is to restore any state
+        // so that the existing view (that wenever got far enough to replace) can continue being used.
+        history()->invalidateCurrentItemCachedPage();
+        
+        // Call clientRedirectCancelledOrFinished here so that the frame load delegate is notified that the redirect's
+        // status has changed, if there was a redirect. The frame load delegate may have saved some state about
+        // the redirect in its -webView:willPerformClientRedirectToURL:delay:fireDate:forFrame:. Since we are definitely
+        // not going to use this provisional resource, as it was cancelled, notify the frame load delegate that the redirect
+        // has ended.
+        if (m_sentRedirectNotification)
+            clientRedirectCancelledOrFinished(false);
+    }
+
+    loader->mainReceivedError(error, isComplete);
+}
+
+void FrameLoader::callContinueFragmentScrollAfterNavigationPolicy(void* argument,
+    const ResourceRequest& request, PassRefPtr<FormState>, bool shouldContinue)
+{
+    FrameLoader* loader = static_cast<FrameLoader*>(argument);
+    loader->continueFragmentScrollAfterNavigationPolicy(request, shouldContinue);
+}
+
+void FrameLoader::continueFragmentScrollAfterNavigationPolicy(const ResourceRequest& request, bool shouldContinue)
+{
+    m_quickRedirectComing = false;
+
+    if (!shouldContinue)
+        return;
+
+    bool isRedirect = m_quickRedirectComing || policyChecker()->loadType() == FrameLoadTypeRedirectWithLockedBackForwardList;    
+    loadInSameDocument(request.url(), 0, !isRedirect);
+}
+
+bool FrameLoader::shouldScrollToAnchor(bool isFormSubmission, const String& httpMethod, FrameLoadType loadType, const KURL& url)
+{
+    // Should we do anchor navigation within the existing content?
+
+    // We don't do this if we are submitting a form with method other than "GET", explicitly reloading,
+    // currently displaying a frameset, or if the URL does not have a fragment.
+    // These rules were originally based on what KHTML was doing in KHTMLPart::openURL.
+
+    // FIXME: What about load types other than Standard and Reload?
+
+    return (!isFormSubmission || equalIgnoringCase(httpMethod, "GET"))
+        && loadType != FrameLoadTypeReload
+        && loadType != FrameLoadTypeReloadFromOrigin
+        && loadType != FrameLoadTypeSame
+        && !shouldReload(this->url(), url)
+        // We don't want to just scroll if a link from within a
+        // frameset is trying to reload the frameset into _top.
+        && !m_frame->document()->isFrameSet();
+}
+
+void FrameLoader::callContinueLoadAfterNavigationPolicy(void* argument,
+    const ResourceRequest& request, PassRefPtr<FormState> formState, bool shouldContinue)
+{
+    FrameLoader* loader = static_cast<FrameLoader*>(argument);
+    loader->continueLoadAfterNavigationPolicy(request, formState, shouldContinue);
+}
+
+bool FrameLoader::shouldClose()
+{
+    Page* page = m_frame->page();
+    Chrome* chrome = page ? page->chrome() : 0;
+    if (!chrome || !chrome->canRunBeforeUnloadConfirmPanel())
+        return true;
+
+    // Store all references to each subframe in advance since beforeunload's event handler may modify frame
+    Vector<RefPtr<Frame> > targetFrames;
+    targetFrames.append(m_frame);
+    for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->traverseNext(m_frame))
+        targetFrames.append(child);
+
+    bool shouldClose = false;
+    {
+        NavigationDisablerForBeforeUnload navigationDisabler;
+        size_t i;
+
+        for (i = 0; i < targetFrames.size(); i++) {
+            if (!targetFrames[i]->tree()->isDescendantOf(m_frame))
+                continue;
+            if (!targetFrames[i]->loader()->fireBeforeUnloadEvent(chrome))
+                break;
+        }
+
+        if (i == targetFrames.size())
+            shouldClose = true;
+    }
+
+    return shouldClose;
+}
+
+bool FrameLoader::fireBeforeUnloadEvent(Chrome* chrome)
+{
+    DOMWindow* domWindow = m_frame->existingDOMWindow();
+    if (!domWindow)
+        return true;
+
+    RefPtr<Document> document = m_frame->document();
+    if (!document->body())
+        return true;
+
+    RefPtr<BeforeUnloadEvent> beforeUnloadEvent = BeforeUnloadEvent::create();
+    m_pageDismissalEventBeingDispatched = true;
+    domWindow->dispatchEvent(beforeUnloadEvent.get(), domWindow->document());
+    m_pageDismissalEventBeingDispatched = false;
+
+    if (!beforeUnloadEvent->defaultPrevented())
+        document->defaultEventHandler(beforeUnloadEvent.get());
+    if (beforeUnloadEvent->result().isNull())
+        return true;
+
+    String text = document->displayStringModifiedByEncoding(beforeUnloadEvent->result());
+    return chrome->runBeforeUnloadConfirmPanel(text, m_frame);
+}
+
+void FrameLoader::continueLoadAfterNavigationPolicy(const ResourceRequest&, PassRefPtr<FormState> formState, bool shouldContinue)
+{
+    // If we loaded an alternate page to replace an unreachableURL, we'll get in here with a
+    // nil policyDataSource because loading the alternate page will have passed
+    // through this method already, nested; otherwise, policyDataSource should still be set.
+    ASSERT(m_policyDocumentLoader || !m_provisionalDocumentLoader->unreachableURL().isEmpty());
+
+    bool isTargetItem = history()->provisionalItem() ? history()->provisionalItem()->isTargetItem() : false;
+
+    // Two reasons we can't continue:
+    //    1) Navigation policy delegate said we can't so request is nil. A primary case of this 
+    //       is the user responding Cancel to the form repost nag sheet.
+    //    2) User responded Cancel to an alert popped up by the before unload event handler.
+    bool canContinue = shouldContinue && shouldClose();
+
+    if (!canContinue) {
+        // If we were waiting for a quick redirect, but the policy delegate decided to ignore it, then we 
+        // need to report that the client redirect was cancelled.
+        if (m_quickRedirectComing)
+            clientRedirectCancelledOrFinished(false);
+
+        setPolicyDocumentLoader(0);
+
+        // If the navigation request came from the back/forward menu, and we punt on it, we have the 
+        // problem that we have optimistically moved the b/f cursor already, so move it back.  For sanity, 
+        // we only do this when punting a navigation for the target frame or top-level frame.  
+        if ((isTargetItem || isLoadingMainFrame()) && isBackForwardLoadType(policyChecker()->loadType()))
+            if (Page* page = m_frame->page()) {
+                Frame* mainFrame = page->mainFrame();
+                if (HistoryItem* resetItem = mainFrame->loader()->history()->currentItem()) {
+                    page->backForward()->setCurrentItem(resetItem);
+                    Settings* settings = m_frame->settings();
+                    page->setGlobalHistoryItem((!settings || settings->privateBrowsingEnabled()) ? 0 : resetItem);
+                }
+            }
+        return;
+    }
+
+    FrameLoadType type = policyChecker()->loadType();
+    stopAllLoaders();
+    
+    // <rdar://problem/6250856> - In certain circumstances on pages with multiple frames, stopAllLoaders()
+    // might detach the current FrameLoader, in which case we should bail on this newly defunct load. 
+    if (!m_frame->page())
+        return;
+
+#if ENABLE(JAVASCRIPT_DEBUGGER) && ENABLE(INSPECTOR) && USE(JSC)
+    if (Page* page = m_frame->page()) {
+        if (page->mainFrame() == m_frame)
+            page->inspectorController()->resume();
+    }
+#endif
+
+    setProvisionalDocumentLoader(m_policyDocumentLoader.get());
+    m_loadType = type;
+    setState(FrameStateProvisional);
+
+    setPolicyDocumentLoader(0);
+
+    if (isBackForwardLoadType(type) && history()->provisionalItem()->isInPageCache()) {
+        loadProvisionalItemFromCachedPage();
+        return;
+    }
+
+    if (formState)
+        m_client->dispatchWillSubmitForm(&PolicyChecker::continueLoadAfterWillSubmitForm, formState);
+    else
+        continueLoadAfterWillSubmitForm();
+}
+
+void FrameLoader::callContinueLoadAfterNewWindowPolicy(void* argument,
+    const ResourceRequest& request, PassRefPtr<FormState> formState, const String& frameName, const NavigationAction& action, bool shouldContinue)
+{
+    FrameLoader* loader = static_cast<FrameLoader*>(argument);
+    loader->continueLoadAfterNewWindowPolicy(request, formState, frameName, action, shouldContinue);
+}
+
+void FrameLoader::continueLoadAfterNewWindowPolicy(const ResourceRequest& request,
+    PassRefPtr<FormState> formState, const String& frameName, const NavigationAction& action, bool shouldContinue)
+{
+    if (!shouldContinue)
+        return;
+
+    RefPtr<Frame> frame = m_frame;
+    RefPtr<Frame> mainFrame = m_client->dispatchCreatePage(action);
+    if (!mainFrame)
+        return;
+
+    if (frameName != "_blank")
+        mainFrame->tree()->setName(frameName);
+
+    mainFrame->page()->setOpenedByDOM();
+    mainFrame->loader()->m_client->dispatchShow();
+    if (!m_suppressOpenerInNewFrame)
+        mainFrame->loader()->setOpener(frame.get());
+    mainFrame->loader()->loadWithNavigationAction(request, NavigationAction(), false, FrameLoadTypeStandard, formState);
+}
+
+void FrameLoader::requestFromDelegate(ResourceRequest& request, unsigned long& identifier, ResourceError& error)
+{
+    ASSERT(!request.isNull());
+
+    identifier = 0;
+    if (Page* page = m_frame->page()) {
+        identifier = page->progress()->createUniqueIdentifier();
+        notifier()->assignIdentifierToInitialRequest(identifier, m_documentLoader.get(), request);
+    }
+
+    ResourceRequest newRequest(request);
+    notifier()->dispatchWillSendRequest(m_documentLoader.get(), identifier, newRequest, ResourceResponse());
+
+    if (newRequest.isNull())
+        error = cancelledError(request);
+    else
+        error = ResourceError();
+
+    request = newRequest;
+}
+
+void FrameLoader::loadedResourceFromMemoryCache(const CachedResource* resource)
+{
+    Page* page = m_frame->page();
+    if (!page)
+        return;
+
+    if (!resource->sendResourceLoadCallbacks() || m_documentLoader->haveToldClientAboutLoad(resource->url()))
+        return;
+
+    if (!page->areMemoryCacheClientCallsEnabled()) {
+#if ENABLE(INSPECTOR)
+        page->inspectorController()->didLoadResourceFromMemoryCache(m_documentLoader.get(), resource);
+#endif
+        m_documentLoader->recordMemoryCacheLoadForFutureClientNotification(resource->url());
+        m_documentLoader->didTellClientAboutLoad(resource->url());
+        return;
+    }
+
+    ResourceRequest request(resource->url());
+    if (m_client->dispatchDidLoadResourceFromMemoryCache(m_documentLoader.get(), request, resource->response(), resource->encodedSize())) {
+#if ENABLE(INSPECTOR)
+        page->inspectorController()->didLoadResourceFromMemoryCache(m_documentLoader.get(), resource);
+#endif
+        m_documentLoader->didTellClientAboutLoad(resource->url());
+        return;
+    }
+
+    unsigned long identifier;
+    ResourceError error;
+    requestFromDelegate(request, identifier, error);
+#if ENABLE(INSPECTOR)
+    page->inspectorController()->markResourceAsCached(identifier);
+#endif
+    notifier()->sendRemainingDelegateMessages(m_documentLoader.get(), identifier, resource->response(), resource->encodedSize(), error);
+}
+
+void FrameLoader::applyUserAgent(ResourceRequest& request)
+{
+    String userAgent = client()->userAgent(request.url());
+    ASSERT(!userAgent.isNull());
+    request.setHTTPUserAgent(userAgent);
+}
+
+bool FrameLoader::shouldInterruptLoadForXFrameOptions(const String& content, const KURL& url)
+{
+    Frame* topFrame = m_frame->tree()->top();
+    if (m_frame == topFrame)
+        return false;
+
+    if (equalIgnoringCase(content, "deny"))
+        return true;
+
+    if (equalIgnoringCase(content, "sameorigin")) {
+        RefPtr<SecurityOrigin> origin = SecurityOrigin::create(url);
+        if (!origin->isSameSchemeHostPort(topFrame->document()->securityOrigin()))
+            return true;
+    }
+
+    return false;
+}
+
+void FrameLoader::loadProvisionalItemFromCachedPage()
+{
+    DocumentLoader* provisionalLoader = provisionalDocumentLoader();
+    LOG(PageCache, "WebCorePageCache: Loading provisional DocumentLoader %p with URL '%s' from CachedPage", provisionalDocumentLoader(), provisionalDocumentLoader()->url().string().utf8().data());
+
+    provisionalLoader->prepareForLoadStart();
+
+    m_loadingFromCachedPage = true;
+    
+    // Should have timing data from previous time(s) the page was shown.
+    ASSERT(provisionalLoader->timing()->navigationStart);
+    provisionalLoader->resetTiming();
+    provisionalLoader->timing()->navigationStart = currentTime();    
+
+    provisionalLoader->setCommitted(true);
+    commitProvisionalLoad();
+}
+
+bool FrameLoader::shouldTreatURLAsSameAsCurrent(const KURL& url) const
+{
+    if (!history()->currentItem())
+        return false;
+    return url == history()->currentItem()->url() || url == history()->currentItem()->originalURL();
+}
+
+void FrameLoader::checkDidPerformFirstNavigation()
+{
+    Page* page = m_frame->page();
+    if (!page)
+        return;
+
+    if (!m_didPerformFirstNavigation && page->backForward()->currentItem() && !page->backForward()->backItem() && !page->backForward()->forwardItem()) {
+        m_didPerformFirstNavigation = true;
+        m_client->didPerformFirstNavigation();
+    }
+}
+
+Frame* FrameLoader::findFrameForNavigation(const AtomicString& name)
+{
+    Frame* frame = m_frame->tree()->find(name);
+    if (!shouldAllowNavigation(frame))
+        return 0;
+    return frame;
+}
+
+void FrameLoader::loadSameDocumentItem(HistoryItem* item)
+{
+    ASSERT(item->documentSequenceNumber() == history()->currentItem()->documentSequenceNumber());
+
+    // Save user view state to the current history item here since we don't do a normal load.
+    // FIXME: Does form state need to be saved here too?
+    history()->saveScrollPositionAndViewStateToItem(history()->currentItem());
+    if (FrameView* view = m_frame->view())
+        view->setWasScrolledByUser(false);
+
+    history()->setCurrentItem(item);
+        
+    // loadInSameDocument() actually changes the URL and notifies load delegates of a "fake" load
+    loadInSameDocument(item->url(), item->stateObject(), false);
+
+    // Restore user view state from the current history item here since we don't do a normal load.
+    history()->restoreScrollPositionAndViewState();
+}
+
+// FIXME: This function should really be split into a couple pieces, some of
+// which should be methods of HistoryController and some of which should be
+// methods of FrameLoader.
+void FrameLoader::loadDifferentDocumentItem(HistoryItem* item, FrameLoadType loadType)
+{
+    // Remember this item so we can traverse any child items as child frames load
+    history()->setProvisionalItem(item);
+
+    if (CachedPage* cachedPage = pageCache()->get(item)) {
+        loadWithDocumentLoader(cachedPage->documentLoader(), loadType, 0);   
+        return;
+    }
+
+    KURL itemURL = item->url();
+    KURL itemOriginalURL = item->originalURL();
+    KURL currentURL;
+    if (documentLoader())
+        currentURL = documentLoader()->url();
+    RefPtr<FormData> formData = item->formData();
+
+    bool addedExtraFields = false;
+    ResourceRequest request(itemURL);
+
+    if (!item->referrer().isNull())
+        request.setHTTPReferrer(item->referrer());
+    
+    // If this was a repost that failed the page cache, we might try to repost the form.
+    NavigationAction action;
+    if (formData) {
+        formData->generateFiles(m_frame->document());
+
+        request.setHTTPMethod("POST");
+        request.setHTTPBody(formData);
+        request.setHTTPContentType(item->formContentType());
+        RefPtr<SecurityOrigin> securityOrigin = SecurityOrigin::createFromString(item->referrer());
+        addHTTPOriginIfNeeded(request, securityOrigin->toString());
+
+        // Make sure to add extra fields to the request after the Origin header is added for the FormData case.
+        // See https://bugs.webkit.org/show_bug.cgi?id=22194 for more discussion.
+        addExtraFieldsToRequest(request, m_loadType, true, formData);
+        addedExtraFields = true;
+        
+        // FIXME: Slight hack to test if the NSURL cache contains the page we're going to.
+        // We want to know this before talking to the policy delegate, since it affects whether 
+        // we show the DoYouReallyWantToRepost nag.
+        //
+        // This trick has a small bug (3123893) where we might find a cache hit, but then
+        // have the item vanish when we try to use it in the ensuing nav.  This should be
+        // extremely rare, but in that case the user will get an error on the navigation.
+        
+        if (ResourceHandle::willLoadFromCache(request, m_frame))
+            action = NavigationAction(itemURL, loadType, false);
+        else {
+            request.setCachePolicy(ReloadIgnoringCacheData);
+            action = NavigationAction(itemURL, NavigationTypeFormResubmitted);
+        }
+    } else {
+        switch (loadType) {
+            case FrameLoadTypeReload:
+            case FrameLoadTypeReloadFromOrigin:
+                request.setCachePolicy(ReloadIgnoringCacheData);
+                break;
+            case FrameLoadTypeBack:
+            case FrameLoadTypeBackWMLDeckNotAccessible:
+            case FrameLoadTypeForward:
+            case FrameLoadTypeIndexedBackForward:
+                // If the first load within a frame is a navigation within a back/forward list that was attached 
+                // without any of the items being loaded then we should use the default caching policy (<rdar://problem/8131355>).
+                if (m_stateMachine.committedFirstRealDocumentLoad() && !itemURL.protocolIs("https"))
+                    request.setCachePolicy(ReturnCacheDataElseLoad);
+                break;
+            case FrameLoadTypeStandard:
+            case FrameLoadTypeRedirectWithLockedBackForwardList:
+                break;
+            case FrameLoadTypeSame:
+            default:
+                ASSERT_NOT_REACHED();
+        }
+
+        action = NavigationAction(itemOriginalURL, loadType, false);
+    }
+    
+    if (!addedExtraFields)
+        addExtraFieldsToRequest(request, m_loadType, true, formData);
+
+    loadWithNavigationAction(request, action, false, loadType, 0);
+}
+
+// Loads content into this frame, as specified by history item
+void FrameLoader::loadItem(HistoryItem* item, FrameLoadType loadType)
+{
+    HistoryItem* currentItem = history()->currentItem();
+    bool sameDocumentNavigation = currentItem && item->shouldDoSameDocumentNavigationTo(currentItem);
+
+#if ENABLE(WML)
+    // All WML decks should go through the real load mechanism, not the scroll-to-anchor code
+    // FIXME: Why do WML decks have this different behavior?
+    // Are WML decks incompatible with HTML5 pushState/replaceState which require inter-document history navigations?
+    // Should this new API be disabled for WML pages, or does WML need to update their mechanism to act like normal loads?
+    // If scroll-to-anchor navigations were broken for WML and required them to have different loading behavior, then  
+    // state object loads are certainly also broken for them.
+    if (frameContainsWMLContent(m_frame))
+        sameDocumentNavigation = false;
+#endif
+
+    if (sameDocumentNavigation)
+        loadSameDocumentItem(item);
+    else
+        loadDifferentDocumentItem(item, loadType);
+}
+
+void FrameLoader::setMainDocumentError(DocumentLoader* loader, const ResourceError& error)
+{
+    m_client->setMainDocumentError(loader, error);
+}
+
+void FrameLoader::mainReceivedCompleteError(DocumentLoader* loader, const ResourceError&)
+{
+    loader->setPrimaryLoadComplete(true);
+    m_client->dispatchDidLoadMainResource(activeDocumentLoader());
+    checkCompleted();
+    if (m_frame->page())
+        checkLoadComplete();
+}
+
+void FrameLoader::mainReceivedError(const ResourceError& error, bool isComplete)
+{
+    activeDocumentLoader()->mainReceivedError(error, isComplete);
+}
+
+ResourceError FrameLoader::cancelledError(const ResourceRequest& request) const
+{
+    ResourceError error = m_client->cancelledError(request);
+    error.setIsCancellation(true);
+    return error;
+}
+
+ResourceError FrameLoader::blockedError(const ResourceRequest& request) const
+{
+    return m_client->blockedError(request);
+}
+
+ResourceError FrameLoader::cannotShowURLError(const ResourceRequest& request) const
+{
+    return m_client->cannotShowURLError(request);
+}
+
+ResourceError FrameLoader::interruptionForPolicyChangeError(const ResourceRequest& request) const
+{
+    return m_client->interruptForPolicyChangeError(request);
+}
+
+ResourceError FrameLoader::fileDoesNotExistError(const ResourceResponse& response) const
+{
+    return m_client->fileDoesNotExistError(response);    
+}
+
+bool FrameLoader::shouldUseCredentialStorage(ResourceLoader* loader)
+{
+    return m_client->shouldUseCredentialStorage(loader->documentLoader(), loader->identifier());
+}
+
+#if USE(PROTECTION_SPACE_AUTH_CALLBACK)
+bool FrameLoader::canAuthenticateAgainstProtectionSpace(ResourceLoader* loader, const ProtectionSpace& protectionSpace)
+{
+    return m_client->canAuthenticateAgainstProtectionSpace(loader->documentLoader(), loader->identifier(), protectionSpace);
+}
+#endif
+
+void FrameLoader::setTitle(const String& title)
+{
+    documentLoader()->setTitle(title);
+}
+
+void FrameLoader::setIconURL(const String& iconURL)
+{
+    documentLoader()->setIconURL(iconURL);
+}
+
+KURL FrameLoader::originalRequestURL() const
+{
+    return activeDocumentLoader()->originalRequest().url();
+}
+
+String FrameLoader::referrer() const
+{
+    return m_documentLoader ? m_documentLoader->request().httpReferrer() : "";
+}
+
+void FrameLoader::dispatchDocumentElementAvailable()
+{
+    m_frame->injectUserScripts(InjectAtDocumentStart);
+    m_client->documentElementAvailable();
+}
+
+void FrameLoader::dispatchDidClearWindowObjectsInAllWorlds()
+{
+    if (!m_frame->script()->canExecuteScripts(NotAboutToExecuteScript))
+        return;
+
+    Vector<DOMWrapperWorld*> worlds;
+    ScriptController::getAllWorlds(worlds);
+    for (size_t i = 0; i < worlds.size(); ++i)
+        dispatchDidClearWindowObjectInWorld(worlds[i]);
+}
+
+void FrameLoader::dispatchDidClearWindowObjectInWorld(DOMWrapperWorld* world)
+{
+    if (!m_frame->script()->canExecuteScripts(NotAboutToExecuteScript) || !m_frame->script()->existingWindowShell(world))
+        return;
+
+    m_client->dispatchDidClearWindowObjectInWorld(world);
+
+#if ENABLE(INSPECTOR)
+    if (world != mainThreadNormalWorld())
+        return;
+
+    if (Page* page = m_frame->page()) {
+        if (InspectorController* inspector = page->inspectorController())
+            inspector->inspectedWindowScriptObjectCleared(m_frame);
+    }
+#endif
+}
+
+void FrameLoader::updateSandboxFlags()
+{
+    SandboxFlags flags = m_forcedSandboxFlags;
+    if (Frame* parentFrame = m_frame->tree()->parent())
+        flags |= parentFrame->loader()->sandboxFlags();
+    if (HTMLFrameOwnerElement* ownerElement = m_frame->ownerElement())
+        flags |= ownerElement->sandboxFlags();
+
+    if (m_sandboxFlags == flags)
+        return;
+
+    m_sandboxFlags = flags;
+
+    for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling())
+        child->loader()->updateSandboxFlags();
+}
+
+void FrameLoader::didChangeTitle(DocumentLoader* loader)
+{
+    m_client->didChangeTitle(loader);
+
+    if (loader == m_documentLoader) {
+        // Must update the entries in the back-forward list too.
+        history()->setCurrentItemTitle(loader->title());
+        // This must go through the WebFrame because it has the right notion of the current b/f item.
+        m_client->setTitle(loader->title(), loader->urlForHistory());
+        m_client->setMainFrameDocumentReady(true); // update observers with new DOMDocument
+        m_client->dispatchDidReceiveTitle(loader->title());
+    }
+}
+
+void FrameLoader::didChangeIcons(DocumentLoader* loader)
+{
+    if (loader == m_documentLoader)
+        m_client->dispatchDidChangeIcons();
+}
+
+void FrameLoader::dispatchDidCommitLoad()
+{
+    if (m_stateMachine.creatingInitialEmptyDocument())
+        return;
+
+    m_client->dispatchDidCommitLoad();
+
+#if ENABLE(INSPECTOR)
+    if (Page* page = m_frame->page())
+        page->inspectorController()->didCommitLoad(m_documentLoader.get());
+#endif
+}
+
+void FrameLoader::tellClientAboutPastMemoryCacheLoads()
+{
+    ASSERT(m_frame->page());
+    ASSERT(m_frame->page()->areMemoryCacheClientCallsEnabled());
+
+    if (!m_documentLoader)
+        return;
+
+    Vector<String> pastLoads;
+    m_documentLoader->takeMemoryCacheLoadsForClientNotification(pastLoads);
+
+    size_t size = pastLoads.size();
+    for (size_t i = 0; i < size; ++i) {
+        CachedResource* resource = cache()->resourceForURL(KURL(ParsedURLString, pastLoads[i]));
+
+        // FIXME: These loads, loaded from cache, but now gone from the cache by the time
+        // Page::setMemoryCacheClientCallsEnabled(true) is called, will not be seen by the client.
+        // Consider if there's some efficient way of remembering enough to deliver this client call.
+        // We have the URL, but not the rest of the response or the length.
+        if (!resource)
+            continue;
+
+        ResourceRequest request(resource->url());
+        m_client->dispatchDidLoadResourceFromMemoryCache(m_documentLoader.get(), request, resource->response(), resource->encodedSize());
+    }
+}
+
+NetworkingContext* FrameLoader::networkingContext() const
+{
+    return m_networkingContext.get();
+}
+
+bool FrameLoaderClient::hasHTMLView() const
+{
+    return true;
+}
+
+Frame* createWindow(Frame* openerFrame, Frame* lookupFrame, const FrameLoadRequest& request, const WindowFeatures& features, bool& created)
+{
+    ASSERT(!features.dialog || request.frameName().isEmpty());
+
+    if (!request.frameName().isEmpty() && request.frameName() != "_blank") {
+        Frame* frame = lookupFrame->tree()->find(request.frameName());
+        if (frame && openerFrame->loader()->shouldAllowNavigation(frame)) {
+            if (!request.resourceRequest().url().isEmpty())
+                frame->loader()->loadFrameRequest(request, false, false, 0, 0, SendReferrer);
+            if (Page* page = frame->page())
+                page->chrome()->focus();
+            created = false;
+            return frame;
+        }
+    }
+
+    // Sandboxed frames cannot open new auxiliary browsing contexts.
+    if (isDocumentSandboxed(openerFrame, SandboxNavigation))
+        return 0;
+
+    // FIXME: Setting the referrer should be the caller's responsibility.
+    FrameLoadRequest requestWithReferrer = request;
+    requestWithReferrer.resourceRequest().setHTTPReferrer(openerFrame->loader()->outgoingReferrer());
+    FrameLoader::addHTTPOriginIfNeeded(requestWithReferrer.resourceRequest(), openerFrame->loader()->outgoingOrigin());
+
+    Page* oldPage = openerFrame->page();
+    if (!oldPage)
+        return 0;
+
+    NavigationAction action;
+    Page* page = oldPage->chrome()->createWindow(openerFrame, requestWithReferrer, features, action);
+    if (!page)
+        return 0;
+
+    Frame* frame = page->mainFrame();
+    if (request.frameName() != "_blank")
+        frame->tree()->setName(request.frameName());
+
+    page->chrome()->setToolbarsVisible(features.toolBarVisible || features.locationBarVisible);
+    page->chrome()->setStatusbarVisible(features.statusBarVisible);
+    page->chrome()->setScrollbarsVisible(features.scrollbarsVisible);
+    page->chrome()->setMenubarVisible(features.menuBarVisible);
+    page->chrome()->setResizable(features.resizable);
+
+    // 'x' and 'y' specify the location of the window, while 'width' and 'height'
+    // specify the size of the page. We can only resize the window, so
+    // adjust for the difference between the window size and the page size.
+
+    FloatRect windowRect = page->chrome()->windowRect();
+    FloatSize pageSize = page->chrome()->pageRect().size();
+    if (features.xSet)
+        windowRect.setX(features.x);
+    if (features.ySet)
+        windowRect.setY(features.y);
+    if (features.widthSet)
+        windowRect.setWidth(features.width + (windowRect.width() - pageSize.width()));
+    if (features.heightSet)
+        windowRect.setHeight(features.height + (windowRect.height() - pageSize.height()));
+    page->chrome()->setWindowRect(windowRect);
+
+    page->chrome()->show();
+
+    created = true;
+    return frame;
+}
+
+} // namespace WebCore