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diff --git a/Source/WebCore/loader/SubframeLoader.cpp b/Source/WebCore/loader/SubframeLoader.cpp
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+/*
+ * 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 "SubframeLoader.h"
+
+#include "Frame.h"
+#include "FrameLoaderClient.h"
+#include "HTMLAppletElement.h"
+#include "HTMLFrameElementBase.h"
+#include "HTMLNames.h"
+#include "HTMLPlugInImageElement.h"
+#include "MIMETypeRegistry.h"
+#include "Page.h"
+#include "PluginData.h"
+#include "PluginDocument.h"
+#include "RenderEmbeddedObject.h"
+#include "RenderView.h"
+#include "Settings.h"
+#include "XSSAuditor.h"
+
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+#include "HTMLMediaElement.h"
+#include "RenderVideo.h"
+#endif
+
+namespace WebCore {
+    
+using namespace HTMLNames;
+
+SubframeLoader::SubframeLoader(Frame* frame)
+    : m_containsPlugins(false)
+    , m_frame(frame)
+{
+}
+
+void SubframeLoader::clear()
+{
+    m_containsPlugins = false;
+}
+
+bool SubframeLoader::requestFrame(HTMLFrameOwnerElement* ownerElement, const String& urlString, const AtomicString& frameName, bool lockHistory, bool lockBackForwardList)
+{
+    // Support for <frame src="javascript:string">
+    KURL scriptURL;
+    KURL url;
+    if (protocolIsJavaScript(urlString)) {
+        scriptURL = completeURL(urlString); // completeURL() encodes the URL.
+        url = blankURL();
+    } else
+        url = completeURL(urlString);
+
+    Frame* frame = loadOrRedirectSubframe(ownerElement, url, frameName, lockHistory, lockBackForwardList);
+    if (!frame)
+        return false;
+
+    if (!scriptURL.isEmpty())
+        frame->script()->executeIfJavaScriptURL(scriptURL);
+
+    return true;
+}
+    
+bool SubframeLoader::resourceWillUsePlugin(const String& url, const String& mimeType)
+{
+    KURL completedURL;
+    if (!url.isEmpty())
+        completedURL = completeURL(url);
+    bool useFallback;
+    return shouldUsePlugin(completedURL, mimeType, false, useFallback);
+}
+
+bool SubframeLoader::requestObject(HTMLPlugInImageElement* ownerElement, const String& url, const AtomicString& frameName,
+    const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues)
+{
+    if (url.isEmpty() && mimeType.isEmpty())
+        return false;
+    
+    if (!m_frame->script()->xssAuditor()->canLoadObject(url)) {
+        // It is unsafe to honor the request for this object.
+        return false;
+    }
+
+    // FIXME: None of this code should use renderers!
+    RenderEmbeddedObject* renderer = ownerElement->renderEmbeddedObject();
+    ASSERT(renderer);
+    if (!renderer)
+        return false;
+
+    KURL completedURL;
+    if (!url.isEmpty())
+        completedURL = completeURL(url);
+
+    bool useFallback;
+    if (shouldUsePlugin(completedURL, mimeType, renderer->hasFallbackContent(), useFallback)) {
+        Settings* settings = m_frame->settings();
+        if ((!allowPlugins(AboutToInstantiatePlugin)
+             // Application plugins are plugins implemented by the user agent, for example Qt plugins,
+             // as opposed to third-party code such as flash. The user agent decides whether or not they are
+             // permitted, rather than WebKit.
+             && !MIMETypeRegistry::isApplicationPluginMIMEType(mimeType))
+            || (!settings->isJavaEnabled() && MIMETypeRegistry::isJavaAppletMIMEType(mimeType)))
+            return false;
+        if (m_frame->document() && m_frame->document()->securityOrigin()->isSandboxed(SandboxPlugins))
+            return false;
+
+        ASSERT(ownerElement->hasTagName(objectTag) || ownerElement->hasTagName(embedTag));
+        HTMLPlugInImageElement* pluginElement = static_cast<HTMLPlugInImageElement*>(ownerElement);
+
+        return loadPlugin(pluginElement, completedURL, mimeType, paramNames, paramValues, useFallback);
+    }
+
+    // If the plug-in element already contains a subframe, loadOrRedirectSubframe will re-use it. Otherwise,
+    // it will create a new frame and set it as the RenderPart's widget, causing what was previously 
+    // in the widget to be torn down.
+    return loadOrRedirectSubframe(ownerElement, completedURL, frameName, true, true);
+}
+
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+PassRefPtr<Widget> SubframeLoader::loadMediaPlayerProxyPlugin(Node* node, const KURL& url,
+    const Vector<String>& paramNames, const Vector<String>& paramValues)
+{
+    ASSERT(node->hasTagName(videoTag) || node->hasTagName(audioTag));
+
+    if (!m_frame->script()->xssAuditor()->canLoadObject(url.string()))
+        return 0;
+
+    KURL completedURL;
+    if (!url.isEmpty())
+        completedURL = completeURL(url);
+
+    if (!m_frame->document()->securityOrigin()->canDisplay(completedURL)) {
+        FrameLoader::reportLocalLoadFailed(m_frame, completedURL.string());
+        return 0;
+    }
+
+    HTMLMediaElement* mediaElement = static_cast<HTMLMediaElement*>(node);
+    RenderPart* renderer = toRenderPart(node->renderer());
+    IntSize size;
+
+    if (renderer)
+        size = IntSize(renderer->contentWidth(), renderer->contentHeight());
+    else if (mediaElement->isVideo())
+        size = RenderVideo::defaultSize();
+
+    m_frame->loader()->checkIfRunInsecureContent(m_frame->document()->securityOrigin(), completedURL);
+
+    RefPtr<Widget> widget = m_frame->loader()->client()->createMediaPlayerProxyPlugin(size, mediaElement, completedURL,
+                                         paramNames, paramValues, "application/x-media-element-proxy-plugin");
+
+    if (widget && renderer) {
+        renderer->setWidget(widget);
+        renderer->node()->setNeedsStyleRecalc(SyntheticStyleChange);
+    }
+    m_containsPlugins = true;
+
+    return widget ? widget.release() : 0;
+}
+
+void FrameLoader::hideMediaPlayerProxyPlugin(Widget* widget)
+{
+    m_client->hideMediaPlayerProxyPlugin(widget);
+}
+
+void FrameLoader::showMediaPlayerProxyPlugin(Widget* widget)
+{
+    m_client->showMediaPlayerProxyPlugin(widget);
+}
+
+#endif // ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+
+PassRefPtr<Widget> SubframeLoader::createJavaAppletWidget(const IntSize& size, HTMLAppletElement* element, const HashMap<String, String>& args)
+{
+    String baseURLString;
+    String codeBaseURLString;
+    Vector<String> paramNames;
+    Vector<String> paramValues;
+    HashMap<String, String>::const_iterator end = args.end();
+    for (HashMap<String, String>::const_iterator it = args.begin(); it != end; ++it) {
+        if (equalIgnoringCase(it->first, "baseurl"))
+            baseURLString = it->second;
+        else if (equalIgnoringCase(it->first, "codebase"))
+            codeBaseURLString = it->second;
+        paramNames.append(it->first);
+        paramValues.append(it->second);
+    }
+
+    if (!codeBaseURLString.isEmpty()) {
+        KURL codeBaseURL = completeURL(codeBaseURLString);
+        if (!element->document()->securityOrigin()->canDisplay(codeBaseURL)) {
+            FrameLoader::reportLocalLoadFailed(m_frame, codeBaseURL.string());
+            return 0;
+        }
+    }
+
+    if (baseURLString.isEmpty())
+        baseURLString = m_frame->document()->baseURL().string();
+    KURL baseURL = completeURL(baseURLString);
+
+    RefPtr<Widget> widget;
+    if (allowPlugins(AboutToInstantiatePlugin))
+        widget = m_frame->loader()->client()->createJavaAppletWidget(size, element, baseURL, paramNames, paramValues);
+    if (!widget)
+        return 0;
+
+    m_containsPlugins = true;
+    return widget;
+}
+
+Frame* SubframeLoader::loadOrRedirectSubframe(HTMLFrameOwnerElement* ownerElement, const KURL& url, const AtomicString& frameName, bool lockHistory, bool lockBackForwardList)
+{
+    Frame* frame = ownerElement->contentFrame();
+    if (frame)
+        frame->navigationScheduler()->scheduleLocationChange(m_frame->document()->securityOrigin(), url.string(), m_frame->loader()->outgoingReferrer(), lockHistory, lockBackForwardList);
+    else
+        frame = loadSubframe(ownerElement, url, frameName, m_frame->loader()->outgoingReferrer());
+    return frame;
+}
+
+Frame* SubframeLoader::loadSubframe(HTMLFrameOwnerElement* ownerElement, const KURL& url, const String& name, const String& referrer)
+{
+    bool allowsScrolling = true;
+    int marginWidth = -1;
+    int marginHeight = -1;
+    if (ownerElement->hasTagName(frameTag) || ownerElement->hasTagName(iframeTag)) {
+        HTMLFrameElementBase* o = static_cast<HTMLFrameElementBase*>(ownerElement);
+        allowsScrolling = o->scrollingMode() != ScrollbarAlwaysOff;
+        marginWidth = o->marginWidth();
+        marginHeight = o->marginHeight();
+    }
+
+    if (!ownerElement->document()->securityOrigin()->canDisplay(url)) {
+        FrameLoader::reportLocalLoadFailed(m_frame, url.string());
+        return 0;
+    }
+
+    bool hideReferrer = SecurityOrigin::shouldHideReferrer(url, referrer);
+    RefPtr<Frame> frame = m_frame->loader()->client()->createFrame(url, name, ownerElement, hideReferrer ? String() : referrer, allowsScrolling, marginWidth, marginHeight);
+
+    if (!frame)  {
+        m_frame->loader()->checkCallImplicitClose();
+        return 0;
+    }
+    
+    // All new frames will have m_isComplete set to true at this point due to synchronously loading
+    // an empty document in FrameLoader::init(). But many frames will now be starting an
+    // asynchronous load of url, so we set m_isComplete to false and then check if the load is
+    // actually completed below. (Note that we set m_isComplete to false even for synchronous
+    // loads, so that checkCompleted() below won't bail early.)
+    // FIXME: Can we remove this entirely? m_isComplete normally gets set to false when a load is committed.
+    frame->loader()->started();
+   
+    RenderObject* renderer = ownerElement->renderer();
+    FrameView* view = frame->view();
+    if (renderer && renderer->isWidget() && view)
+        toRenderWidget(renderer)->setWidget(view);
+    
+    m_frame->loader()->checkCallImplicitClose();
+    
+    // Some loads are performed synchronously (e.g., about:blank and loads
+    // cancelled by returning a null ResourceRequest from requestFromDelegate).
+    // In these cases, the synchronous load would have finished
+    // before we could connect the signals, so make sure to send the 
+    // completed() signal for the child by hand and mark the load as being
+    // complete.
+    // FIXME: In this case the Frame will have finished loading before 
+    // it's being added to the child list. It would be a good idea to
+    // create the child first, then invoke the loader separately.
+    if (frame->loader()->state() == FrameStateComplete && !frame->loader()->policyDocumentLoader())
+        frame->loader()->checkCompleted();
+
+    return frame.get();
+}
+
+bool SubframeLoader::allowPlugins(ReasonForCallingAllowPlugins reason)
+{
+    Settings* settings = m_frame->settings();
+    bool allowed = m_frame->loader()->client()->allowPlugins(settings && settings->arePluginsEnabled());
+    if (!allowed && reason == AboutToInstantiatePlugin)
+        m_frame->loader()->client()->didNotAllowPlugins();
+    return allowed;
+}
+
+bool SubframeLoader::shouldUsePlugin(const KURL& url, const String& mimeType, bool hasFallback, bool& useFallback)
+{
+    if (m_frame->loader()->client()->shouldUsePluginDocument(mimeType)) {
+        useFallback = false;
+        return true;
+    }
+
+    // Allow other plug-ins to win over QuickTime because if the user has installed a plug-in that
+    // can handle TIFF (which QuickTime can also handle) they probably intended to override QT.
+    if (m_frame->page() && (mimeType == "image/tiff" || mimeType == "image/tif" || mimeType == "image/x-tiff")) {
+        const PluginData* pluginData = m_frame->page()->pluginData();
+        String pluginName = pluginData ? pluginData->pluginNameForMimeType(mimeType) : String();
+        if (!pluginName.isEmpty() && !pluginName.contains("QuickTime", false)) 
+            return true;
+    }
+        
+    ObjectContentType objectType = m_frame->loader()->client()->objectContentType(url, mimeType);
+    // If an object's content can't be handled and it has no fallback, let
+    // it be handled as a plugin to show the broken plugin icon.
+    useFallback = objectType == ObjectContentNone && hasFallback;
+    return objectType == ObjectContentNone || objectType == ObjectContentNetscapePlugin || objectType == ObjectContentOtherPlugin;
+}
+
+Document* SubframeLoader::document() const
+{
+    return m_frame->document();
+}
+
+bool SubframeLoader::loadPlugin(HTMLPlugInImageElement* pluginElement, const KURL& url, const String& mimeType,
+    const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback)
+{
+    RenderEmbeddedObject* renderer = pluginElement->renderEmbeddedObject();
+
+    // FIXME: This code should not depend on renderer!
+    if (!renderer || useFallback)
+        return false;
+
+    if (!document()->securityOrigin()->canDisplay(url)) {
+        FrameLoader::reportLocalLoadFailed(m_frame, url.string());
+        return false;
+    }
+
+    FrameLoader* frameLoader = m_frame->loader();
+    frameLoader->checkIfRunInsecureContent(document()->securityOrigin(), url);
+
+    IntSize contentSize(renderer->contentWidth(), renderer->contentHeight());
+    bool loadManually = document()->isPluginDocument() && !m_containsPlugins && toPluginDocument(document())->shouldLoadPluginManually();
+    RefPtr<Widget> widget = frameLoader->client()->createPlugin(contentSize,
+        pluginElement, url, paramNames, paramValues, mimeType, loadManually);
+
+    if (!widget) {
+        renderer->setShowsMissingPluginIndicator();
+        return false;
+    }
+
+    renderer->setWidget(widget);
+    m_containsPlugins = true;
+ 
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO) || ENABLE(3D_PLUGIN)
+    pluginElement->setNeedsStyleRecalc(SyntheticStyleChange);
+#endif
+    return true;
+}
+
+KURL SubframeLoader::completeURL(const String& url) const
+{
+    ASSERT(m_frame->document());
+    return m_frame->document()->completeURL(url);
+}
+
+} // namespace WebCore