Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 2521 insertions, 0 deletions

diff --git a/Source/WebCore/html/HTMLMediaElement.cpp b/Source/WebCore/html/HTMLMediaElement.cpp
new file mode 100644
index 0000000..43d53f5
--- /dev/null
+++ b/Source/WebCore/html/HTMLMediaElement.cpp
@@ -0,0 +1,2521 @@
+/*
+ * Copyright (C) 2007, 2008, 2009, 2010 Apple Inc. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. OR
+ * 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"
+
+#if ENABLE(VIDEO)
+#include "HTMLMediaElement.h"
+
+#include "Attribute.h"
+#include "Chrome.h"
+#include "ChromeClient.h"
+#include "ClientRect.h"
+#include "ClientRectList.h"
+#include "ContentType.h"
+#include "CSSPropertyNames.h"
+#include "CSSValueKeywords.h"
+#include "Event.h"
+#include "EventNames.h"
+#include "ExceptionCode.h"
+#include "Frame.h"
+#include "FrameLoader.h"
+#include "FrameLoaderClient.h"
+#include "FrameView.h"
+#include "HTMLDocument.h"
+#include "HTMLNames.h"
+#include "HTMLSourceElement.h"
+#include "HTMLVideoElement.h"
+#include "Logging.h"
+#include "MediaDocument.h"
+#include "MediaError.h"
+#include "MediaList.h"
+#include "MediaPlayer.h"
+#include "MediaQueryEvaluator.h"
+#include "MIMETypeRegistry.h"
+#include "Page.h"
+#include "RenderVideo.h"
+#include "RenderView.h"
+#include "ScriptEventListener.h"
+#include "Settings.h"
+#include "TimeRanges.h"
+#include <limits>
+#include <wtf/CurrentTime.h>
+#include <wtf/MathExtras.h>
+#include <wtf/text/CString.h>
+
+#if USE(ACCELERATED_COMPOSITING)
+#include "RenderView.h"
+#include "RenderLayerCompositor.h"
+#endif
+
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+#include "RenderEmbeddedObject.h"
+#include "Widget.h"
+#endif
+
+using namespace std;
+
+namespace WebCore {
+
+#if !LOG_DISABLED
+static String urlForLogging(const String& url)
+{
+    static const unsigned maximumURLLengthForLogging = 128;
+
+    if (url.length() < maximumURLLengthForLogging)
+        return url;
+    return url.substring(0, maximumURLLengthForLogging) + "...";
+}
+
+static const char *boolString(bool val)
+{
+    return val ? "true" : "false";
+}
+#endif
+
+#ifndef LOG_MEDIA_EVENTS
+// Default to not logging events because so many are generated they can overwhelm the rest of 
+// the logging.
+#define LOG_MEDIA_EVENTS 0
+#endif
+
+#ifndef LOG_CACHED_TIME_WARNINGS
+// Default to not logging warnings about excessive drift in the cached media time because it adds a
+// fair amount of overhead and logging.
+#define LOG_CACHED_TIME_WARNINGS 0
+#endif
+
+static const float invalidMediaTime = -1;
+
+using namespace HTMLNames;
+
+HTMLMediaElement::HTMLMediaElement(const QualifiedName& tagName, Document* document)
+    : HTMLElement(tagName, document)
+    , ActiveDOMObject(document, this)
+    , m_loadTimer(this, &HTMLMediaElement::loadTimerFired)
+    , m_asyncEventTimer(this, &HTMLMediaElement::asyncEventTimerFired)
+    , m_progressEventTimer(this, &HTMLMediaElement::progressEventTimerFired)
+    , m_playbackProgressTimer(this, &HTMLMediaElement::playbackProgressTimerFired)
+    , m_playedTimeRanges()
+    , m_playbackRate(1.0f)
+    , m_defaultPlaybackRate(1.0f)
+    , m_webkitPreservesPitch(true)
+    , m_networkState(NETWORK_EMPTY)
+    , m_readyState(HAVE_NOTHING)
+    , m_readyStateMaximum(HAVE_NOTHING)
+    , m_volume(1.0f)
+    , m_lastSeekTime(0)
+    , m_previousProgress(0)
+    , m_previousProgressTime(numeric_limits<double>::max())
+    , m_lastTimeUpdateEventWallTime(0)
+    , m_lastTimeUpdateEventMovieTime(numeric_limits<float>::max())
+    , m_loadState(WaitingForSource)
+    , m_currentSourceNode(0)
+    , m_nextChildNodeToConsider(0)
+    , m_player(0)
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    , m_proxyWidget(0)
+#endif
+    , m_restrictions(NoRestrictions)
+    , m_preload(MediaPlayer::Auto)
+    , m_displayMode(Unknown)
+    , m_processingMediaPlayerCallback(0)
+    , m_cachedTime(invalidMediaTime)
+    , m_cachedTimeWallClockUpdateTime(0)
+    , m_minimumWallClockTimeToCacheMediaTime(0)
+    , m_playing(false)
+    , m_isWaitingUntilMediaCanStart(false)
+    , m_shouldDelayLoadEvent(false)
+    , m_haveFiredLoadedData(false)
+    , m_inActiveDocument(true)
+    , m_autoplaying(true)
+    , m_muted(false)
+    , m_paused(true)
+    , m_seeking(false)
+    , m_sentStalledEvent(false)
+    , m_sentEndEvent(false)
+    , m_pausedInternal(false)
+    , m_sendProgressEvents(true)
+    , m_isFullscreen(false)
+    , m_closedCaptionsVisible(false)
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    , m_needWidgetUpdate(false)
+#endif
+    , m_dispatchingCanPlayEvent(false)
+    , m_loadInitiatedByUserGesture(false)
+    , m_completelyLoaded(false)
+{
+    LOG(Media, "HTMLMediaElement::HTMLMediaElement");
+    document->registerForDocumentActivationCallbacks(this);
+    document->registerForMediaVolumeCallbacks(this);
+#if PLATFORM(ANDROID) && ENABLE(TOUCH_EVENTS)
+    // Enable the Media Element to listen to all the touch events
+    document->addListenerTypeIfNeeded(eventNames().touchstartEvent);
+#endif
+}
+
+HTMLMediaElement::~HTMLMediaElement()
+{
+    LOG(Media, "HTMLMediaElement::~HTMLMediaElement");
+    if (m_isWaitingUntilMediaCanStart)
+        document()->removeMediaCanStartListener(this);
+    setShouldDelayLoadEvent(false);
+    document()->unregisterForDocumentActivationCallbacks(this);
+    document()->unregisterForMediaVolumeCallbacks(this);
+}
+
+void HTMLMediaElement::willMoveToNewOwnerDocument()
+{
+    if (m_isWaitingUntilMediaCanStart)
+        document()->removeMediaCanStartListener(this);
+    setShouldDelayLoadEvent(false);
+    document()->unregisterForDocumentActivationCallbacks(this);
+    document()->unregisterForMediaVolumeCallbacks(this);
+    HTMLElement::willMoveToNewOwnerDocument();
+}
+
+void HTMLMediaElement::didMoveToNewOwnerDocument()
+{
+    if (m_isWaitingUntilMediaCanStart)
+        document()->addMediaCanStartListener(this);
+    if (m_readyState < HAVE_CURRENT_DATA)
+        setShouldDelayLoadEvent(true);
+    document()->registerForDocumentActivationCallbacks(this);
+    document()->registerForMediaVolumeCallbacks(this);
+    HTMLElement::didMoveToNewOwnerDocument();
+}
+
+void HTMLMediaElement::attributeChanged(Attribute* attr, bool preserveDecls)
+{
+    HTMLElement::attributeChanged(attr, preserveDecls);
+
+    const QualifiedName& attrName = attr->name();
+    if (attrName == srcAttr) {
+        // Trigger a reload, as long as the 'src' attribute is present.
+        if (!getAttribute(srcAttr).isEmpty())
+            scheduleLoad();
+    }
+    else if (attrName == controlsAttr) {
+#if !ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+        if (!isVideo() && attached() && (controls() != (renderer() != 0))) {
+            detach();
+            attach();
+        }
+        if (renderer())
+            renderer()->updateFromElement();
+#else
+        if (m_player)
+            m_player->setControls(controls());
+#endif
+    }
+}
+
+void HTMLMediaElement::parseMappedAttribute(Attribute* attr)
+{
+    const QualifiedName& attrName = attr->name();
+
+    if (attrName == preloadAttr) {
+        String value = attr->value();
+
+        if (equalIgnoringCase(value, "none"))
+            m_preload = MediaPlayer::None;
+        else if (equalIgnoringCase(value, "metadata"))
+            m_preload = MediaPlayer::MetaData;
+        else {
+            // The spec does not define an "invalid value default" but "auto" is suggested as the
+            // "missing value default", so use it for everything except "none" and "metadata"
+            m_preload = MediaPlayer::Auto;
+        }
+
+        // The attribute must be ignored if the autoplay attribute is present
+        if (!autoplay() && m_player)
+            m_player->setPreload(m_preload);
+
+    } else if (attrName == onabortAttr)
+        setAttributeEventListener(eventNames().abortEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onbeforeloadAttr)
+        setAttributeEventListener(eventNames().beforeloadEvent, createAttributeEventListener(this, attr));
+    else if (attrName == oncanplayAttr)
+        setAttributeEventListener(eventNames().canplayEvent, createAttributeEventListener(this, attr));
+    else if (attrName == oncanplaythroughAttr)
+        setAttributeEventListener(eventNames().canplaythroughEvent, createAttributeEventListener(this, attr));
+    else if (attrName == ondurationchangeAttr)
+        setAttributeEventListener(eventNames().durationchangeEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onemptiedAttr)
+        setAttributeEventListener(eventNames().emptiedEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onendedAttr)
+        setAttributeEventListener(eventNames().endedEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onerrorAttr)
+        setAttributeEventListener(eventNames().errorEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onloadeddataAttr)
+        setAttributeEventListener(eventNames().loadeddataEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onloadedmetadataAttr)
+        setAttributeEventListener(eventNames().loadedmetadataEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onloadstartAttr)
+        setAttributeEventListener(eventNames().loadstartEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onpauseAttr)
+        setAttributeEventListener(eventNames().pauseEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onplayAttr)
+        setAttributeEventListener(eventNames().playEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onplayingAttr)
+        setAttributeEventListener(eventNames().playingEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onprogressAttr)
+        setAttributeEventListener(eventNames().progressEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onratechangeAttr)
+        setAttributeEventListener(eventNames().ratechangeEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onseekedAttr)
+        setAttributeEventListener(eventNames().seekedEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onseekingAttr)
+        setAttributeEventListener(eventNames().seekingEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onstalledAttr)
+        setAttributeEventListener(eventNames().stalledEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onsuspendAttr)
+        setAttributeEventListener(eventNames().suspendEvent, createAttributeEventListener(this, attr));
+    else if (attrName == ontimeupdateAttr)
+        setAttributeEventListener(eventNames().timeupdateEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onvolumechangeAttr)
+        setAttributeEventListener(eventNames().volumechangeEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onwaitingAttr)
+        setAttributeEventListener(eventNames().waitingEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onwebkitbeginfullscreenAttr)
+        setAttributeEventListener(eventNames().webkitbeginfullscreenEvent, createAttributeEventListener(this, attr));
+    else if (attrName == onwebkitendfullscreenAttr)
+        setAttributeEventListener(eventNames().webkitendfullscreenEvent, createAttributeEventListener(this, attr));
+    else
+        HTMLElement::parseMappedAttribute(attr);
+}
+
+bool HTMLMediaElement::rendererIsNeeded(RenderStyle* style)
+{
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    UNUSED_PARAM(style);
+    Frame* frame = document()->frame();
+    if (!frame)
+        return false;
+
+    return true;
+#else
+    return controls() ? HTMLElement::rendererIsNeeded(style) : false;
+#endif
+}
+
+RenderObject* HTMLMediaElement::createRenderer(RenderArena* arena, RenderStyle*)
+{
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    // Setup the renderer if we already have a proxy widget.
+    RenderEmbeddedObject* mediaRenderer = new (arena) RenderEmbeddedObject(this);
+    if (m_proxyWidget) {
+        mediaRenderer->setWidget(m_proxyWidget);
+
+        Frame* frame = document()->frame();
+        FrameLoader* loader = frame ? frame->loader() : 0;
+        if (loader)
+            loader->showMediaPlayerProxyPlugin(m_proxyWidget.get());
+    }
+    return mediaRenderer;
+#else
+    return new (arena) RenderMedia(this);
+#endif
+}
+ 
+void HTMLMediaElement::insertedIntoDocument()
+{
+    LOG(Media, "HTMLMediaElement::removedFromDocument");
+    HTMLElement::insertedIntoDocument();
+    if (!getAttribute(srcAttr).isEmpty() && m_networkState == NETWORK_EMPTY)
+        scheduleLoad();
+}
+
+void HTMLMediaElement::removedFromDocument()
+{
+    LOG(Media, "HTMLMediaElement::removedFromDocument");
+    if (m_networkState > NETWORK_EMPTY)
+        pause(processingUserGesture());
+    if (m_isFullscreen)
+        exitFullscreen();
+    HTMLElement::removedFromDocument();
+}
+
+void HTMLMediaElement::attach()
+{
+    ASSERT(!attached());
+
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    m_needWidgetUpdate = true;
+#endif
+
+    HTMLElement::attach();
+
+    if (renderer())
+        renderer()->updateFromElement();
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    else if (m_proxyWidget) {
+        Frame* frame = document()->frame();
+        FrameLoader* loader = frame ? frame->loader() : 0;
+        if (loader)
+            loader->hideMediaPlayerProxyPlugin(m_proxyWidget.get());
+    }
+#endif
+}
+
+void HTMLMediaElement::recalcStyle(StyleChange change)
+{
+    HTMLElement::recalcStyle(change);
+
+    if (renderer())
+        renderer()->updateFromElement();
+}
+
+void HTMLMediaElement::scheduleLoad()
+{
+    LOG(Media, "HTMLMediaElement::scheduleLoad");
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    createMediaPlayerProxy();
+#endif
+
+    if (m_loadTimer.isActive())
+        return;
+    prepareForLoad();
+    m_loadTimer.startOneShot(0);
+}
+
+void HTMLMediaElement::scheduleNextSourceChild()
+{
+    // Schedule the timer to try the next <source> element WITHOUT resetting state ala prepareForLoad.
+    m_loadTimer.startOneShot(0);
+}
+
+void HTMLMediaElement::scheduleEvent(const AtomicString& eventName)
+{
+#if LOG_MEDIA_EVENTS
+    LOG(Media, "HTMLMediaElement::scheduleEvent - scheduling '%s'", eventName.string().ascii().data());
+#endif
+    m_pendingEvents.append(Event::create(eventName, false, true));
+    if (!m_asyncEventTimer.isActive())
+        m_asyncEventTimer.startOneShot(0);
+}
+
+void HTMLMediaElement::asyncEventTimerFired(Timer<HTMLMediaElement>*)
+{
+    Vector<RefPtr<Event> > pendingEvents;
+    ExceptionCode ec = 0;
+
+    m_pendingEvents.swap(pendingEvents);
+    unsigned count = pendingEvents.size();
+    for (unsigned ndx = 0; ndx < count; ++ndx) {
+#if LOG_MEDIA_EVENTS
+        LOG(Media, "HTMLMediaElement::asyncEventTimerFired - dispatching '%s'", pendingEvents[ndx]->type().string().ascii().data());
+#endif
+        if (pendingEvents[ndx]->type() == eventNames().canplayEvent) {
+            m_dispatchingCanPlayEvent = true;
+            dispatchEvent(pendingEvents[ndx].release(), ec);
+            m_dispatchingCanPlayEvent = false;
+        } else
+            dispatchEvent(pendingEvents[ndx].release(), ec);
+    }
+}
+
+void HTMLMediaElement::loadTimerFired(Timer<HTMLMediaElement>*)
+{
+    if (m_loadState == LoadingFromSourceElement)
+        loadNextSourceChild();
+    else
+        loadInternal();
+}
+
+PassRefPtr<MediaError> HTMLMediaElement::error() const 
+{
+    return m_error;
+}
+
+void HTMLMediaElement::setSrc(const String& url)
+{
+    setAttribute(srcAttr, url);
+}
+
+String HTMLMediaElement::currentSrc() const
+{
+    return m_currentSrc;
+}
+
+HTMLMediaElement::NetworkState HTMLMediaElement::networkState() const
+{
+    return m_networkState;
+}
+
+String HTMLMediaElement::canPlayType(const String& mimeType) const
+{
+    MediaPlayer::SupportsType support = MediaPlayer::supportsType(ContentType(mimeType));
+    String canPlay;
+
+    // 4.8.10.3
+    switch (support)
+    {
+        case MediaPlayer::IsNotSupported:
+            canPlay = "";
+            break;
+        case MediaPlayer::MayBeSupported:
+            canPlay = "maybe";
+            break;
+        case MediaPlayer::IsSupported:
+            canPlay = "probably";
+            break;
+    }
+    
+    LOG(Media, "HTMLMediaElement::canPlayType(%s) -> %s", mimeType.utf8().data(), canPlay.utf8().data());
+
+    return canPlay;
+}
+
+void HTMLMediaElement::load(bool isUserGesture, ExceptionCode& ec)
+{
+    LOG(Media, "HTMLMediaElement::load(isUserGesture : %s)", boolString(isUserGesture));
+
+    if (m_restrictions & RequireUserGestureForLoadRestriction && !isUserGesture)
+        ec = INVALID_STATE_ERR;
+    else {
+        m_loadInitiatedByUserGesture = isUserGesture;
+        prepareForLoad();
+        loadInternal();
+    }
+}
+
+void HTMLMediaElement::prepareForLoad()
+{
+    LOG(Media, "HTMLMediaElement::prepareForLoad");
+
+    // Perform the cleanup required for the resource load algorithm to run.
+    stopPeriodicTimers();
+    m_loadTimer.stop();
+    m_sentStalledEvent = false;
+    m_haveFiredLoadedData = false;
+    m_completelyLoaded = false;
+    m_displayMode = Unknown;
+
+    // 1 - Abort any already-running instance of the resource selection algorithm for this element.
+    m_loadState = WaitingForSource;
+    m_currentSourceNode = 0;
+
+    // 2 - If there are any tasks from the media element's media element event task source in 
+    // one of the task queues, then remove those tasks.
+    cancelPendingEventsAndCallbacks();
+
+    // 3 - If the media element's networkState is set to NETWORK_LOADING or NETWORK_IDLE, queue
+    // a task to fire a simple event named abort at the media element.
+    if (m_networkState == NETWORK_LOADING || m_networkState == NETWORK_IDLE)
+        scheduleEvent(eventNames().abortEvent);
+
+#if !ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    m_player = MediaPlayer::create(this);
+#else
+    if (m_player)
+        m_player->cancelLoad();
+    else
+        createMediaPlayerProxy();
+#endif
+
+    // 4 - If the media element's networkState is not set to NETWORK_EMPTY, then run these substeps
+    if (m_networkState != NETWORK_EMPTY) {
+        m_networkState = NETWORK_EMPTY;
+        m_readyState = HAVE_NOTHING;
+        m_readyStateMaximum = HAVE_NOTHING;
+        refreshCachedTime();
+        m_paused = true;
+        m_seeking = false;
+        scheduleEvent(eventNames().emptiedEvent);
+    }
+
+    // 5 - Set the playbackRate attribute to the value of the defaultPlaybackRate attribute.
+    setPlaybackRate(defaultPlaybackRate());
+
+    // 6 - Set the error attribute to null and the autoplaying flag to true.
+    m_error = 0;
+    m_autoplaying = true;
+
+    // 7 - Invoke the media element's resource selection algorithm.
+
+    // 8 - Note: Playback of any previously playing media resource for this element stops.
+
+    // The resource selection algorithm
+    // 1 - Set the networkState to NETWORK_NO_SOURCE
+    m_networkState = NETWORK_NO_SOURCE;
+
+    // 2 - Asynchronously await a stable state.
+
+    m_playedTimeRanges = TimeRanges::create();
+    m_lastSeekTime = 0;
+    m_closedCaptionsVisible = false;
+
+    // The spec doesn't say to block the load event until we actually run the asynchronous section
+    // algorithm, but do it now because we won't start that until after the timer fires and the 
+    // event may have already fired by then.
+    setShouldDelayLoadEvent(true);
+}
+
+void HTMLMediaElement::loadInternal()
+{
+    // If we can't start a load right away, start it later.
+    Page* page = document()->page();
+    if (page && !page->canStartMedia()) {
+        if (m_isWaitingUntilMediaCanStart)
+            return;
+        document()->addMediaCanStartListener(this);
+        m_isWaitingUntilMediaCanStart = true;
+        return;
+    }
+
+    selectMediaResource();
+}
+
+void HTMLMediaElement::selectMediaResource()
+{
+    LOG(Media, "HTMLMediaElement::selectMediaResource");
+
+    enum Mode { attribute, children };
+    Mode mode = attribute;
+
+    // 3 - ... the media element has neither a src attribute ...
+    if (!hasAttribute(srcAttr)) {
+        // ... nor a source element child: ...
+        Node* node;
+        for (node = firstChild(); node; node = node->nextSibling()) {
+            if (node->hasTagName(sourceTag))
+                break;
+        }
+
+        if (!node) {
+            m_loadState = WaitingForSource;
+            setShouldDelayLoadEvent(false);
+
+            // ... set the networkState to NETWORK_EMPTY, and abort these steps
+            m_networkState = NETWORK_EMPTY;
+
+            LOG(Media, "HTMLMediaElement::selectMediaResource, nothing to load");
+            return;
+        }
+
+        mode = children;
+    }
+
+    // 4 - Set the media element's delaying-the-load-event flag to true (this delays the load event), 
+    // and set its networkState to NETWORK_LOADING.
+    setShouldDelayLoadEvent(true);
+    m_networkState = NETWORK_LOADING;
+
+    // 5
+    scheduleEvent(eventNames().loadstartEvent);
+
+    // 6 - If mode is attribute, then run these substeps
+    if (mode == attribute) {
+        // If the src attribute's value is the empty string ... jump down to the failed step below
+        KURL mediaURL = getNonEmptyURLAttribute(srcAttr);
+        if (mediaURL.isEmpty()) {
+            noneSupported();
+            LOG(Media, "HTMLMediaElement::selectMediaResource, empty 'src'");
+            return;
+        }
+
+        if (isSafeToLoadURL(mediaURL, Complain) && dispatchBeforeLoadEvent(mediaURL.string())) {
+            ContentType contentType("");
+            m_loadState = LoadingFromSrcAttr;
+            loadResource(mediaURL, contentType);
+        } else 
+            noneSupported();
+
+        LOG(Media, "HTMLMediaElement::selectMediaResource, 'src' not used");
+        return;
+    }
+
+    // Otherwise, the source elements will be used
+    m_currentSourceNode = 0;
+    loadNextSourceChild();
+}
+
+void HTMLMediaElement::loadNextSourceChild()
+{
+    ContentType contentType("");
+    KURL mediaURL = selectNextSourceChild(&contentType, Complain);
+    if (!mediaURL.isValid()) {
+        waitForSourceChange();
+        return;
+    }
+
+#if !ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    // Recreate the media player for the new url
+    m_player = MediaPlayer::create(this);
+#endif
+
+    m_loadState = LoadingFromSourceElement;
+    loadResource(mediaURL, contentType);
+}
+
+void HTMLMediaElement::loadResource(const KURL& initialURL, ContentType& contentType)
+{
+    ASSERT(isSafeToLoadURL(initialURL, Complain));
+
+    LOG(Media, "HTMLMediaElement::loadResource(%s, %s)", urlForLogging(initialURL.string()).utf8().data(), contentType.raw().utf8().data());
+
+    Frame* frame = document()->frame();
+    if (!frame)
+        return;
+    FrameLoader* loader = frame->loader();
+    if (!loader)
+        return;
+
+    KURL url(initialURL);
+    if (!loader->willLoadMediaElementURL(url))
+        return;
+
+    // The resource fetch algorithm 
+    m_networkState = NETWORK_LOADING;
+
+    m_currentSrc = url;
+
+    LOG(Media, "HTMLMediaElement::loadResource - m_currentSrc -> %s", urlForLogging(m_currentSrc).utf8().data());
+
+    if (m_sendProgressEvents) 
+        startProgressEventTimer();
+
+    if (!autoplay())
+        m_player->setPreload(m_preload);
+    m_player->setPreservesPitch(m_webkitPreservesPitch);
+    updateVolume();
+
+#if PLATFORM(ANDROID)
+    if (isVideo())
+        m_player->setMediaElementType(MediaPlayer::Video);
+    else
+        m_player->setMediaElementType(MediaPlayer::Audio);
+#endif
+    m_player->load(m_currentSrc, contentType);
+
+    // If there is no poster to display, allow the media engine to render video frames as soon as
+    // they are available.
+    updateDisplayState();
+
+    if (renderer())
+        renderer()->updateFromElement();
+}
+
+bool HTMLMediaElement::isSafeToLoadURL(const KURL& url, InvalidSourceAction actionIfInvalid)
+{
+    if (!url.isValid()) {
+        LOG(Media, "HTMLMediaElement::isSafeToLoadURL(%s) -> FALSE because url is invalid", urlForLogging(url.string()).utf8().data());
+        return false;
+    }
+
+    Frame* frame = document()->frame();
+    if (!frame || !document()->securityOrigin()->canDisplay(url)) {
+        if (actionIfInvalid == Complain)
+            FrameLoader::reportLocalLoadFailed(frame, url.string());
+        LOG(Media, "HTMLMediaElement::isSafeToLoadURL(%s) -> FALSE rejected by SecurityOrigin", urlForLogging(url.string()).utf8().data());
+        return false;
+    }
+
+    return true;
+}
+
+void HTMLMediaElement::startProgressEventTimer()
+{
+    if (m_progressEventTimer.isActive())
+        return;
+
+    m_previousProgressTime = WTF::currentTime();
+    m_previousProgress = 0;
+    // 350ms is not magic, it is in the spec!
+    m_progressEventTimer.startRepeating(0.350);
+}
+
+void HTMLMediaElement::waitForSourceChange()
+{
+    LOG(Media, "HTMLMediaElement::waitForSourceChange");
+
+    stopPeriodicTimers();
+    m_loadState = WaitingForSource;
+
+    // 6.17 - Waiting: Set the element's networkState attribute to the NETWORK_NO_SOURCE value
+    m_networkState = NETWORK_NO_SOURCE;
+
+    // 6.18 - Set the element's delaying-the-load-event flag to false. This stops delaying the load event.
+    setShouldDelayLoadEvent(false);
+}
+
+void HTMLMediaElement::noneSupported()
+{
+    LOG(Media, "HTMLMediaElement::noneSupported");
+
+    stopPeriodicTimers();
+    m_loadState = WaitingForSource;
+    m_currentSourceNode = 0;
+
+    // 5 - Reaching this step indicates that either the URL failed to resolve, or the media
+    // resource failed to load. Set the error attribute to a new MediaError object whose
+    // code attribute is set to MEDIA_ERR_SRC_NOT_SUPPORTED.
+    m_error = MediaError::create(MediaError::MEDIA_ERR_SRC_NOT_SUPPORTED);
+
+    // 6 - Set the element's networkState attribute to the NETWORK_NO_SOURCE value.
+    m_networkState = NETWORK_NO_SOURCE;
+
+    // 7 - Queue a task to fire a progress event called error at the media element, in
+    // the context of the fetching process that was used to try to obtain the media
+    // resource in the resource fetch algorithm.
+    scheduleEvent(eventNames().errorEvent);
+
+    // 8 - Set the element's delaying-the-load-event flag to false. This stops delaying the load event.
+    setShouldDelayLoadEvent(false);
+
+    // 9 -Abort these steps. Until the load() method is invoked, the element won't attempt to load another resource.
+
+    updateDisplayState();
+
+    if (renderer())
+        renderer()->updateFromElement();
+}
+
+void HTMLMediaElement::mediaEngineError(PassRefPtr<MediaError> err)
+{
+    LOG(Media, "HTMLMediaElement::mediaEngineError(%d)", static_cast<int>(err->code()));
+
+    // 1 - The user agent should cancel the fetching process.
+    stopPeriodicTimers();
+    m_loadState = WaitingForSource;
+
+    // 2 - Set the error attribute to a new MediaError object whose code attribute is 
+    // set to MEDIA_ERR_NETWORK/MEDIA_ERR_DECODE.
+    m_error = err;
+
+    // 3 - Queue a task to fire a simple event named error at the media element.
+    scheduleEvent(eventNames().errorEvent);
+
+    // 4 - Set the element's networkState attribute to the NETWORK_EMPTY value and queue a
+    // task to fire a simple event called emptied at the element.
+    m_networkState = NETWORK_EMPTY;
+    scheduleEvent(eventNames().emptiedEvent);
+
+    // 5 - Set the element's delaying-the-load-event flag to false. This stops delaying the load event.
+    setShouldDelayLoadEvent(false);
+
+    // 6 - Abort the overall resource selection algorithm.
+    m_currentSourceNode = 0;
+}
+
+void HTMLMediaElement::cancelPendingEventsAndCallbacks()
+{
+    LOG(Media, "HTMLMediaElement::cancelPendingEventsAndCallbacks");
+
+    m_pendingEvents.clear();
+
+    for (Node* node = firstChild(); node; node = node->nextSibling()) {
+        if (node->hasTagName(sourceTag))
+            static_cast<HTMLSourceElement*>(node)->cancelPendingErrorEvent();
+    }
+}
+
+Document* HTMLMediaElement::mediaPlayerOwningDocument()
+{
+    Document* d = document();
+    
+    if (!d)
+        d = ownerDocument();
+    
+    return d;
+}
+
+void HTMLMediaElement::mediaPlayerNetworkStateChanged(MediaPlayer*)
+{
+    beginProcessingMediaPlayerCallback();
+    setNetworkState(m_player->networkState());
+    endProcessingMediaPlayerCallback();
+}
+
+void HTMLMediaElement::setNetworkState(MediaPlayer::NetworkState state)
+{
+    LOG(Media, "HTMLMediaElement::setNetworkState(%d) - current state is %d", static_cast<int>(state), static_cast<int>(m_networkState));
+
+    if (state == MediaPlayer::Empty) {
+        // Just update the cached state and leave, we can't do anything.
+        m_networkState = NETWORK_EMPTY;
+        return;
+    }
+
+    if (state == MediaPlayer::FormatError || state == MediaPlayer::NetworkError || state == MediaPlayer::DecodeError) {
+        stopPeriodicTimers();
+
+        // If we failed while trying to load a <source> element, the movie was never parsed, and there are more
+        // <source> children, schedule the next one
+        if (m_readyState < HAVE_METADATA && m_loadState == LoadingFromSourceElement) {
+
+            if (m_currentSourceNode)
+                m_currentSourceNode->scheduleErrorEvent();
+            else
+                LOG(Media, "HTMLMediaElement::setNetworkState - error event not sent, <source> was removed");
+
+            if (havePotentialSourceChild()) {
+                LOG(Media, "HTMLMediaElement::setNetworkState - scheduling next <source>");
+                scheduleNextSourceChild();
+            } else {
+                LOG(Media, "HTMLMediaElement::setNetworkState - no more <source> elements, waiting");
+                waitForSourceChange();
+            }
+
+            return;
+        }
+
+        if (state == MediaPlayer::NetworkError)
+            mediaEngineError(MediaError::create(MediaError::MEDIA_ERR_NETWORK));
+        else if (state == MediaPlayer::DecodeError)
+            mediaEngineError(MediaError::create(MediaError::MEDIA_ERR_DECODE));
+        else if (state == MediaPlayer::FormatError && m_loadState == LoadingFromSrcAttr)
+            noneSupported();
+
+        updateDisplayState();
+        return;
+    }
+
+    if (state == MediaPlayer::Idle) {
+        if (m_networkState > NETWORK_IDLE) {
+            m_progressEventTimer.stop();
+            scheduleEvent(eventNames().suspendEvent);
+        }
+        m_networkState = NETWORK_IDLE;
+    }
+
+    if (state == MediaPlayer::Loading) {
+        if (m_networkState < NETWORK_LOADING || m_networkState == NETWORK_NO_SOURCE)
+            startProgressEventTimer();
+        m_networkState = NETWORK_LOADING;
+    }
+
+    if (state == MediaPlayer::Loaded) {
+        if (m_networkState != NETWORK_IDLE) {
+            m_progressEventTimer.stop();
+
+            // Schedule one last progress event so we guarantee that at least one is fired
+            // for files that load very quickly.
+            scheduleEvent(eventNames().progressEvent);
+        }
+        m_networkState = NETWORK_IDLE;
+        m_completelyLoaded = true;
+    }
+}
+
+void HTMLMediaElement::mediaPlayerReadyStateChanged(MediaPlayer*)
+{
+    beginProcessingMediaPlayerCallback();
+
+    setReadyState(m_player->readyState());
+
+    endProcessingMediaPlayerCallback();
+}
+
+void HTMLMediaElement::setReadyState(MediaPlayer::ReadyState state)
+{
+    LOG(Media, "HTMLMediaElement::setReadyState(%d) - current state is %d,", static_cast<int>(state), static_cast<int>(m_readyState));
+
+    // Set "wasPotentiallyPlaying" BEFORE updating m_readyState, potentiallyPlaying() uses it
+    bool wasPotentiallyPlaying = potentiallyPlaying();
+
+    ReadyState oldState = m_readyState;
+    m_readyState = static_cast<ReadyState>(state);
+
+    if (m_readyState == oldState)
+        return;
+    
+    if (oldState > m_readyStateMaximum)
+        m_readyStateMaximum = oldState;
+
+    if (m_networkState == NETWORK_EMPTY)
+        return;
+
+    if (m_seeking) {
+        // 4.8.10.9, step 11
+        if (wasPotentiallyPlaying && m_readyState < HAVE_FUTURE_DATA)
+            scheduleEvent(eventNames().waitingEvent);
+
+        // 4.8.10.10 step 14 & 15.
+        if (m_readyState >= HAVE_CURRENT_DATA)
+            finishSeek();
+    } else {
+        if (wasPotentiallyPlaying && m_readyState < HAVE_FUTURE_DATA) {
+            // 4.8.10.8
+            scheduleTimeupdateEvent(false);
+            scheduleEvent(eventNames().waitingEvent);
+        }
+    }
+
+    if (m_readyState >= HAVE_METADATA && oldState < HAVE_METADATA) {
+        scheduleEvent(eventNames().durationchangeEvent);
+        scheduleEvent(eventNames().loadedmetadataEvent);
+        if (renderer())
+            renderer()->updateFromElement();
+        m_player->seek(0);
+    }
+
+    bool shouldUpdateDisplayState = false;
+
+    if (m_readyState >= HAVE_CURRENT_DATA && oldState < HAVE_CURRENT_DATA && !m_haveFiredLoadedData) {
+        m_haveFiredLoadedData = true;
+        shouldUpdateDisplayState = true;
+        scheduleEvent(eventNames().loadeddataEvent);
+        setShouldDelayLoadEvent(false);
+    }
+
+    bool isPotentiallyPlaying = potentiallyPlaying();
+    if (m_readyState == HAVE_FUTURE_DATA && oldState <= HAVE_CURRENT_DATA) {
+        scheduleEvent(eventNames().canplayEvent);
+        if (isPotentiallyPlaying)
+            scheduleEvent(eventNames().playingEvent);
+        shouldUpdateDisplayState = true;
+    }
+
+    if (m_readyState == HAVE_ENOUGH_DATA && oldState < HAVE_ENOUGH_DATA) {
+        if (oldState <= HAVE_CURRENT_DATA)
+            scheduleEvent(eventNames().canplayEvent);
+
+        scheduleEvent(eventNames().canplaythroughEvent);
+
+        if (isPotentiallyPlaying && oldState <= HAVE_CURRENT_DATA)
+            scheduleEvent(eventNames().playingEvent);
+
+        if (m_autoplaying && m_paused && autoplay()) {
+            m_paused = false;
+            scheduleEvent(eventNames().playEvent);
+            scheduleEvent(eventNames().playingEvent);
+        }
+
+        shouldUpdateDisplayState = true;
+    }
+
+    if (shouldUpdateDisplayState)
+        updateDisplayState();
+
+    updatePlayState();
+}
+
+void HTMLMediaElement::progressEventTimerFired(Timer<HTMLMediaElement>*)
+{
+    ASSERT(m_player);
+    if (m_networkState != NETWORK_LOADING)
+        return;
+
+    unsigned progress = m_player->bytesLoaded();
+    double time = WTF::currentTime();
+    double timedelta = time - m_previousProgressTime;
+
+    if (progress == m_previousProgress) {
+        if (timedelta > 3.0 && !m_sentStalledEvent) {
+            scheduleEvent(eventNames().stalledEvent);
+            m_sentStalledEvent = true;
+        }
+    } else {
+        scheduleEvent(eventNames().progressEvent);
+        m_previousProgress = progress;
+        m_previousProgressTime = time;
+        m_sentStalledEvent = false;
+        if (renderer())
+            renderer()->updateFromElement();
+    }
+}
+
+void HTMLMediaElement::rewind(float timeDelta)
+{
+    LOG(Media, "HTMLMediaElement::rewind(%f)", timeDelta);
+
+    ExceptionCode e;
+    setCurrentTime(max(currentTime() - timeDelta, minTimeSeekable()), e);
+}
+
+void HTMLMediaElement::returnToRealtime()
+{
+    LOG(Media, "HTMLMediaElement::returnToRealtime");
+    ExceptionCode e;
+    setCurrentTime(maxTimeSeekable(), e);
+}  
+
+void HTMLMediaElement::addPlayedRange(float start, float end)
+{
+    LOG(Media, "HTMLMediaElement::addPlayedRange(%f, %f)", start, end);
+    if (!m_playedTimeRanges)
+        m_playedTimeRanges = TimeRanges::create();
+    m_playedTimeRanges->add(start, end);
+}  
+
+bool HTMLMediaElement::supportsSave() const
+{
+    return m_player ? m_player->supportsSave() : false;
+}
+    
+void HTMLMediaElement::seek(float time, ExceptionCode& ec)
+{
+    LOG(Media, "HTMLMediaElement::seek(%f)", time);
+
+    // 4.8.9.9 Seeking
+
+    // 1 - If the media element's readyState is HAVE_NOTHING, then raise an INVALID_STATE_ERR exception.
+    if (m_readyState == HAVE_NOTHING || !m_player) {
+        ec = INVALID_STATE_ERR;
+        return;
+    }
+
+    // Get the current time before setting m_seeking, m_lastSeekTime is returned once it is set.
+    refreshCachedTime();
+    float now = currentTime();
+
+    // 2 - If the element's seeking IDL attribute is true, then another instance of this algorithm is
+    // already running. Abort that other instance of the algorithm without waiting for the step that
+    // it is running to complete.
+    // Nothing specific to be done here.
+
+    // 3 - Set the seeking IDL attribute to true.
+    // The flag will be cleared when the engine tells us the time has actually changed.
+    m_seeking = true;
+
+    // 5 - If the new playback position is later than the end of the media resource, then let it be the end 
+    // of the media resource instead.
+    time = min(time, duration());
+
+    // 6 - If the new playback position is less than the earliest possible position, let it be that position instead.
+    float earliestTime = m_player->startTime();
+    time = max(time, earliestTime);
+
+    // Ask the media engine for the time value in the movie's time scale before comparing with current time. This
+    // is necessary because if the seek time is not equal to currentTime but the delta is less than the movie's
+    // time scale, we will ask the media engine to "seek" to the current movie time, which may be a noop and
+    // not generate a timechanged callback. This means m_seeking will never be cleared and we will never 
+    // fire a 'seeked' event.
+#if !LOG_DISABLED
+    float mediaTime = m_player->mediaTimeForTimeValue(time);
+    if (time != mediaTime)
+        LOG(Media, "HTMLMediaElement::seek(%f) - media timeline equivalent is %f", time, mediaTime);
+#endif
+    time = m_player->mediaTimeForTimeValue(time);
+
+    // 7 - If the (possibly now changed) new playback position is not in one of the ranges given in the 
+    // seekable attribute, then let it be the position in one of the ranges given in the seekable attribute 
+    // that is the nearest to the new playback position. ... If there are no ranges given in the seekable
+    // attribute then set the seeking IDL attribute to false and abort these steps.
+    RefPtr<TimeRanges> seekableRanges = seekable();
+
+    // Short circuit seeking to the current time by just firing the events if no seek is required.
+    // Don't skip calling the media engine if we are in poster mode because a seek should always 
+    // cancel poster display.
+    bool noSeekRequired = !seekableRanges->length() || (time == now && displayMode() != Poster);
+    if (noSeekRequired) {
+        if (time == now) {
+            scheduleEvent(eventNames().seekingEvent);
+            scheduleTimeupdateEvent(false);
+            scheduleEvent(eventNames().seekedEvent);
+        }
+        m_seeking = false;
+        return;
+    }
+    time = seekableRanges->nearest(time);
+
+    if (m_playing) {
+        if (m_lastSeekTime < now)
+            addPlayedRange(m_lastSeekTime, now);
+    }
+    m_lastSeekTime = time;
+    m_sentEndEvent = false;
+
+    // 8 - Set the current playback position to the given new playback position
+    m_player->seek(time);
+
+    // 9 - Queue a task to fire a simple event named seeking at the element.
+    scheduleEvent(eventNames().seekingEvent);
+
+    // 10 - Queue a task to fire a simple event named timeupdate at the element.
+    scheduleTimeupdateEvent(false);
+
+    // 11-15 are handled, if necessary, when the engine signals a readystate change.
+}
+
+void HTMLMediaElement::finishSeek()
+{
+    LOG(Media, "HTMLMediaElement::finishSeek");
+
+    // 4.8.10.9 Seeking step 14
+    m_seeking = false;
+
+    // 4.8.10.9 Seeking step 15
+    scheduleEvent(eventNames().seekedEvent);
+
+    setDisplayMode(Video);
+}
+
+HTMLMediaElement::ReadyState HTMLMediaElement::readyState() const
+{
+    return m_readyState;
+}
+
+MediaPlayer::MovieLoadType HTMLMediaElement::movieLoadType() const
+{
+    return m_player ? m_player->movieLoadType() : MediaPlayer::Unknown;
+}
+
+bool HTMLMediaElement::hasAudio() const
+{
+    return m_player ? m_player->hasAudio() : false;
+}
+
+bool HTMLMediaElement::seeking() const
+{
+    return m_seeking;
+}
+
+void HTMLMediaElement::refreshCachedTime() const
+{
+    m_cachedTime = m_player->currentTime();
+    m_cachedTimeWallClockUpdateTime = WTF::currentTime();
+}
+
+void HTMLMediaElement::invalidateCachedTime()
+{
+    LOG(Media, "HTMLMediaElement::invalidateCachedTime");
+
+    // Don't try to cache movie time when playback first starts as the time reported by the engine
+    // sometimes fluctuates for a short amount of time, so the cached time will be off if we take it
+    // too early.
+    static const double minimumTimePlayingBeforeCacheSnapshot = 0.5;
+
+    m_minimumWallClockTimeToCacheMediaTime = WTF::currentTime() + minimumTimePlayingBeforeCacheSnapshot;
+    m_cachedTime = invalidMediaTime;
+}
+
+// playback state
+float HTMLMediaElement::currentTime() const
+{
+#if LOG_CACHED_TIME_WARNINGS
+    static const double minCachedDeltaForWarning = 0.01;
+#endif
+
+    if (!m_player)
+        return 0;
+
+    if (m_seeking) {
+        LOG(Media, "HTMLMediaElement::currentTime - seeking, returning %f", m_lastSeekTime);
+        return m_lastSeekTime;
+    }
+
+    if (m_cachedTime != invalidMediaTime && m_paused) {
+#if LOG_CACHED_TIME_WARNINGS
+        float delta = m_cachedTime - m_player->currentTime();
+        if (delta > minCachedDeltaForWarning)
+            LOG(Media, "HTMLMediaElement::currentTime - WARNING, cached time is %f seconds off of media time when paused", delta);
+#endif
+        return m_cachedTime;
+    }
+
+    // Is it too soon use a cached time?
+    double now = WTF::currentTime();
+    double maximumDurationToCacheMediaTime = m_player->maximumDurationToCacheMediaTime();
+
+    if (maximumDurationToCacheMediaTime && m_cachedTime != invalidMediaTime && !m_paused && now > m_minimumWallClockTimeToCacheMediaTime) {
+        double wallClockDelta = now - m_cachedTimeWallClockUpdateTime;
+
+        // Not too soon, use the cached time only if it hasn't expired.
+        if (wallClockDelta < maximumDurationToCacheMediaTime) {
+            float adjustedCacheTime = static_cast<float>(m_cachedTime + (m_playbackRate * wallClockDelta));
+
+#if LOG_CACHED_TIME_WARNINGS
+            float delta = adjustedCacheTime - m_player->currentTime();
+            if (delta > minCachedDeltaForWarning)
+                LOG(Media, "HTMLMediaElement::currentTime - WARNING, cached time is %f seconds off of media time when playing", delta);
+#endif
+            return adjustedCacheTime;
+        }
+    }
+
+#if LOG_CACHED_TIME_WARNINGS
+    if (maximumDurationToCacheMediaTime && now > m_minimumWallClockTimeToCacheMediaTime && m_cachedTime != invalidMediaTime) {
+        double wallClockDelta = now - m_cachedTimeWallClockUpdateTime;
+        float delta = m_cachedTime + (m_playbackRate * wallClockDelta) - m_player->currentTime();
+        LOG(Media, "HTMLMediaElement::currentTime - cached time was %f seconds off of media time when it expired", delta);
+    }
+#endif
+
+    refreshCachedTime();
+
+    return m_cachedTime;
+}
+
+void HTMLMediaElement::setCurrentTime(float time, ExceptionCode& ec)
+{
+    seek(time, ec);
+}
+
+float HTMLMediaElement::startTime() const
+{
+    if (!m_player)
+        return 0;
+    return m_player->startTime();
+}
+
+float HTMLMediaElement::duration() const
+{
+    if (m_player && m_readyState >= HAVE_METADATA)
+        return m_player->duration();
+
+    return numeric_limits<float>::quiet_NaN();
+}
+
+bool HTMLMediaElement::paused() const
+{
+    return m_paused;
+}
+
+float HTMLMediaElement::defaultPlaybackRate() const
+{
+    return m_defaultPlaybackRate;
+}
+
+void HTMLMediaElement::setDefaultPlaybackRate(float rate)
+{
+    if (m_defaultPlaybackRate != rate) {
+        m_defaultPlaybackRate = rate;
+        scheduleEvent(eventNames().ratechangeEvent);
+    }
+}
+
+float HTMLMediaElement::playbackRate() const
+{
+    return m_player ? m_player->rate() : 0;
+}
+
+void HTMLMediaElement::setPlaybackRate(float rate)
+{
+    LOG(Media, "HTMLMediaElement::setPlaybackRate(%f)", rate);
+
+    if (m_playbackRate != rate) {
+        m_playbackRate = rate;
+        scheduleEvent(eventNames().ratechangeEvent);
+    }
+    if (m_player && potentiallyPlaying() && m_player->rate() != rate)
+        m_player->setRate(rate);
+}
+
+bool HTMLMediaElement::webkitPreservesPitch() const
+{
+    return m_webkitPreservesPitch;
+}
+
+void HTMLMediaElement::setWebkitPreservesPitch(bool preservesPitch)
+{
+    LOG(Media, "HTMLMediaElement::setWebkitPreservesPitch(%s)", boolString(preservesPitch));
+
+    m_webkitPreservesPitch = preservesPitch;
+    
+    if (!m_player)
+        return;
+
+    m_player->setPreservesPitch(preservesPitch);
+}
+
+bool HTMLMediaElement::ended() const
+{
+    // 4.8.10.8 Playing the media resource
+    // The ended attribute must return true if the media element has ended 
+    // playback and the direction of playback is forwards, and false otherwise.
+    return endedPlayback() && m_playbackRate > 0;
+}
+
+bool HTMLMediaElement::autoplay() const
+{
+    return hasAttribute(autoplayAttr);
+}
+
+void HTMLMediaElement::setAutoplay(bool b)
+{
+    LOG(Media, "HTMLMediaElement::setAutoplay(%s)", boolString(b));
+    setBooleanAttribute(autoplayAttr, b);
+}
+
+String HTMLMediaElement::preload() const
+{
+    switch (m_preload) {
+    case MediaPlayer::None:
+        return "none";
+        break;
+    case MediaPlayer::MetaData:
+        return "metadata";
+        break;
+    case MediaPlayer::Auto:
+        return "auto";
+        break;
+    }
+
+    ASSERT_NOT_REACHED();
+    return String();
+}
+
+void HTMLMediaElement::setPreload(const String& preload)
+{
+    LOG(Media, "HTMLMediaElement::setPreload(%s)", preload.utf8().data());
+    setAttribute(preloadAttr, preload);
+}
+
+void HTMLMediaElement::play(bool isUserGesture)
+{
+    LOG(Media, "HTMLMediaElement::play(isUserGesture : %s)", boolString(isUserGesture));
+
+    if (m_restrictions & RequireUserGestureForRateChangeRestriction && !isUserGesture)
+        return;
+
+    Document* doc = document();
+    Settings* settings = doc->settings();
+    if (settings && settings->needsSiteSpecificQuirks() && m_dispatchingCanPlayEvent && !m_loadInitiatedByUserGesture) {
+        // It should be impossible to be processing the canplay event while handling a user gesture
+        // since it is dispatched asynchronously.
+        ASSERT(!isUserGesture);
+        String host = doc->baseURL().host();
+        if (host.endsWith(".npr.org", false) || equalIgnoringCase(host, "npr.org"))
+            return;
+    }
+    
+    playInternal();
+}
+
+void HTMLMediaElement::playInternal()
+{
+    LOG(Media, "HTMLMediaElement::playInternal");
+
+    // 4.8.10.9. Playing the media resource
+    if (!m_player || m_networkState == NETWORK_EMPTY)
+        scheduleLoad();
+
+    if (endedPlayback()) {
+        ExceptionCode unused;
+        seek(0, unused);
+    }
+    
+    setPlaybackRate(defaultPlaybackRate());
+    
+    if (m_paused) {
+        m_paused = false;
+        scheduleEvent(eventNames().playEvent);
+
+        if (m_readyState <= HAVE_CURRENT_DATA)
+            scheduleEvent(eventNames().waitingEvent);
+        else if (m_readyState >= HAVE_FUTURE_DATA)
+            scheduleEvent(eventNames().playingEvent);
+    }
+    m_autoplaying = false;
+
+    updatePlayState();
+}
+
+void HTMLMediaElement::pause(bool isUserGesture)
+{
+    LOG(Media, "HTMLMediaElement::pause(isUserGesture : %s)", boolString(isUserGesture));
+
+    if (m_restrictions & RequireUserGestureForRateChangeRestriction && !isUserGesture)
+        return;
+
+    pauseInternal();
+}
+
+
+void HTMLMediaElement::pauseInternal()
+{
+    LOG(Media, "HTMLMediaElement::pauseInternal");
+
+    // 4.8.10.9. Playing the media resource
+    if (!m_player || m_networkState == NETWORK_EMPTY)
+        scheduleLoad();
+
+    m_autoplaying = false;
+    
+    if (!m_paused) {
+        m_paused = true;
+        scheduleTimeupdateEvent(false);
+        scheduleEvent(eventNames().pauseEvent);
+    }
+
+    updatePlayState();
+}
+
+bool HTMLMediaElement::loop() const
+{
+    return hasAttribute(loopAttr);
+}
+
+void HTMLMediaElement::setLoop(bool b)
+{
+    LOG(Media, "HTMLMediaElement::setLoop(%s)", boolString(b));
+    setBooleanAttribute(loopAttr, b);
+}
+
+bool HTMLMediaElement::controls() const
+{
+    Frame* frame = document()->frame();
+
+    // always show controls when scripting is disabled
+    if (frame && !frame->script()->canExecuteScripts(NotAboutToExecuteScript))
+        return true;
+
+    return hasAttribute(controlsAttr);
+}
+
+void HTMLMediaElement::setControls(bool b)
+{
+    LOG(Media, "HTMLMediaElement::setControls(%s)", boolString(b));
+    setBooleanAttribute(controlsAttr, b);
+}
+
+float HTMLMediaElement::volume() const
+{
+    return m_volume;
+}
+
+void HTMLMediaElement::setVolume(float vol, ExceptionCode& ec)
+{
+    LOG(Media, "HTMLMediaElement::setVolume(%f)", vol);
+
+    if (vol < 0.0f || vol > 1.0f) {
+        ec = INDEX_SIZE_ERR;
+        return;
+    }
+    
+    if (m_volume != vol) {
+        m_volume = vol;
+        updateVolume();
+        scheduleEvent(eventNames().volumechangeEvent);
+    }
+}
+
+bool HTMLMediaElement::muted() const
+{
+    return m_muted;
+}
+
+void HTMLMediaElement::setMuted(bool muted)
+{
+    LOG(Media, "HTMLMediaElement::setMuted(%s)", boolString(muted));
+
+    if (m_muted != muted) {
+        m_muted = muted;
+        // Avoid recursion when the player reports volume changes.
+        if (!processingMediaPlayerCallback()) {
+            if (m_player) {
+                m_player->setMuted(m_muted);
+                if (renderer())
+                    renderer()->updateFromElement();
+            } else
+                updateVolume();
+        }
+        scheduleEvent(eventNames().volumechangeEvent);
+    }
+}
+
+void HTMLMediaElement::togglePlayState()
+{
+    LOG(Media, "HTMLMediaElement::togglePlayState - canPlay() is %s", boolString(canPlay()));
+
+    // We can safely call the internal play/pause methods, which don't check restrictions, because
+    // this method is only called from the built-in media controller
+    if (canPlay())
+        playInternal();
+    else 
+        pauseInternal();
+}
+
+void HTMLMediaElement::beginScrubbing()
+{
+    LOG(Media, "HTMLMediaElement::beginScrubbing - paused() is %s", boolString(paused()));
+
+    if (!paused()) {
+        if (ended()) {
+            // Because a media element stays in non-paused state when it reaches end, playback resumes 
+            // when the slider is dragged from the end to another position unless we pause first. Do 
+            // a "hard pause" so an event is generated, since we want to stay paused after scrubbing finishes.
+            pause(processingUserGesture());
+        } else {
+            // Not at the end but we still want to pause playback so the media engine doesn't try to
+            // continue playing during scrubbing. Pause without generating an event as we will 
+            // unpause after scrubbing finishes.
+            setPausedInternal(true);
+        }
+    }
+}
+
+void HTMLMediaElement::endScrubbing()
+{
+    LOG(Media, "HTMLMediaElement::endScrubbing - m_pausedInternal is %s", boolString(m_pausedInternal));
+
+    if (m_pausedInternal)
+        setPausedInternal(false);
+}
+
+// The spec says to fire periodic timeupdate events (those sent while playing) every
+// "15 to 250ms", we choose the slowest frequency
+static const double maxTimeupdateEventFrequency = 0.25;
+
+void HTMLMediaElement::startPlaybackProgressTimer()
+{
+    if (m_playbackProgressTimer.isActive())
+        return;
+
+    m_previousProgressTime = WTF::currentTime();
+    m_previousProgress = 0;
+    m_playbackProgressTimer.startRepeating(maxTimeupdateEventFrequency);
+}
+
+void HTMLMediaElement::playbackProgressTimerFired(Timer<HTMLMediaElement>*)
+{
+    ASSERT(m_player);
+    if (!m_playbackRate)
+        return;
+
+    scheduleTimeupdateEvent(true);
+    
+    // FIXME: deal with cue ranges here
+}
+
+void HTMLMediaElement::scheduleTimeupdateEvent(bool periodicEvent)
+{
+    double now = WTF::currentTime();
+    double timedelta = now - m_lastTimeUpdateEventWallTime;
+
+    // throttle the periodic events
+    if (periodicEvent && timedelta < maxTimeupdateEventFrequency)
+        return;
+
+    // Some media engines make multiple "time changed" callbacks at the same time, but we only want one
+    // event at a given time so filter here
+    float movieTime = currentTime();
+    if (movieTime != m_lastTimeUpdateEventMovieTime) {
+        scheduleEvent(eventNames().timeupdateEvent);
+        m_lastTimeUpdateEventWallTime = now;
+        m_lastTimeUpdateEventMovieTime = movieTime;
+    }
+}
+
+bool HTMLMediaElement::canPlay() const
+{
+    return paused() || ended() || m_readyState < HAVE_METADATA;
+}
+
+float HTMLMediaElement::percentLoaded() const
+{
+    if (!m_player)
+        return 0;
+    float duration = m_player->duration();
+
+    if (!duration || isinf(duration))
+        return 0;
+
+    float buffered = 0;
+    RefPtr<TimeRanges> timeRanges = m_player->buffered();
+    for (unsigned i = 0; i < timeRanges->length(); ++i) {
+        ExceptionCode ignoredException;
+        float start = timeRanges->start(i, ignoredException);
+        float end = timeRanges->end(i, ignoredException);
+        buffered += end - start;
+    }
+    return buffered / duration;
+}
+
+bool HTMLMediaElement::havePotentialSourceChild()
+{
+    // Stash the current <source> node and next nodes so we can restore them after checking
+    // to see there is another potential.
+    HTMLSourceElement* currentSourceNode = m_currentSourceNode;
+    Node* nextNode = m_nextChildNodeToConsider;
+
+    KURL nextURL = selectNextSourceChild(0, DoNothing);
+
+    m_currentSourceNode = currentSourceNode;
+    m_nextChildNodeToConsider = nextNode;
+
+    return nextURL.isValid();
+}
+
+KURL HTMLMediaElement::selectNextSourceChild(ContentType *contentType, InvalidSourceAction actionIfInvalid)
+{
+#if !LOG_DISABLED
+    // Don't log if this was just called to find out if there are any valid <source> elements.
+    bool shouldLog = actionIfInvalid != DoNothing;
+    if (shouldLog)
+        LOG(Media, "HTMLMediaElement::selectNextSourceChild(contentType : \"%s\")", contentType ? contentType->raw().utf8().data() : "");
+#endif
+
+    if (m_nextChildNodeToConsider == sourceChildEndOfListValue()) {
+#if !LOG_DISABLED
+        if (shouldLog)
+            LOG(Media, "HTMLMediaElement::selectNextSourceChild -> 0x0000, \"\"");
+#endif
+        return KURL();
+    }
+
+    KURL mediaURL;
+    Node* node;
+    HTMLSourceElement* source = 0;
+    bool lookingForStartNode = m_nextChildNodeToConsider;
+    bool canUse = false;
+
+    for (node = firstChild(); !canUse && node; node = node->nextSibling()) {
+        if (lookingForStartNode && m_nextChildNodeToConsider != node)
+            continue;
+        lookingForStartNode = false;
+        
+        if (!node->hasTagName(sourceTag))
+            continue;
+
+        source = static_cast<HTMLSourceElement*>(node);
+
+        // If candidate does not have a src attribute, or if its src attribute's value is the empty string ... jump down to the failed step below
+        mediaURL = source->getNonEmptyURLAttribute(srcAttr);
+#if !LOG_DISABLED
+        if (shouldLog)
+            LOG(Media, "HTMLMediaElement::selectNextSourceChild - 'src' is %s", urlForLogging(mediaURL).utf8().data());
+#endif
+        if (mediaURL.isEmpty())
+            goto check_again;
+        
+        if (source->hasAttribute(mediaAttr)) {
+            MediaQueryEvaluator screenEval("screen", document()->frame(), renderer() ? renderer()->style() : 0);
+            RefPtr<MediaList> media = MediaList::createAllowingDescriptionSyntax(source->media());
+#if !LOG_DISABLED
+            if (shouldLog)
+                LOG(Media, "HTMLMediaElement::selectNextSourceChild - 'media' is %s", source->media().utf8().data());
+#endif
+            if (!screenEval.eval(media.get())) 
+                goto check_again;
+        }
+
+        if (source->hasAttribute(typeAttr)) {
+#if !LOG_DISABLED
+            if (shouldLog)
+                LOG(Media, "HTMLMediaElement::selectNextSourceChild - 'type' is %s", source->type().utf8().data());
+#endif
+            if (!MediaPlayer::supportsType(ContentType(source->type())))
+                goto check_again;
+        }
+
+        // Is it safe to load this url?
+        if (!isSafeToLoadURL(mediaURL, actionIfInvalid) || !dispatchBeforeLoadEvent(mediaURL.string()))
+            goto check_again;
+
+        // Making it this far means the <source> looks reasonable.
+        canUse = true;
+
+check_again:
+        if (!canUse && actionIfInvalid == Complain)
+            source->scheduleErrorEvent();
+    }
+
+    if (canUse) {
+        if (contentType)
+            *contentType = ContentType(source->type());
+        m_currentSourceNode = source;
+        m_nextChildNodeToConsider = source->nextSibling();
+        if (!m_nextChildNodeToConsider)
+            m_nextChildNodeToConsider = sourceChildEndOfListValue();
+    } else {
+        m_currentSourceNode = 0;
+        m_nextChildNodeToConsider = sourceChildEndOfListValue();
+    }
+
+#if !LOG_DISABLED
+    if (shouldLog)
+        LOG(Media, "HTMLMediaElement::selectNextSourceChild -> %p, %s", m_currentSourceNode, canUse ? urlForLogging(mediaURL.string()).utf8().data() : "");
+#endif
+    return canUse ? mediaURL : KURL();
+}
+
+void HTMLMediaElement::sourceWasAdded(HTMLSourceElement* source)
+{
+    LOG(Media, "HTMLMediaElement::sourceWasAdded(%p)", source);
+
+#if !LOG_DISABLED
+    if (source->hasTagName(sourceTag)) {
+        KURL url = source->getNonEmptyURLAttribute(srcAttr);
+        LOG(Media, "HTMLMediaElement::sourceWasAdded - 'src' is %s", urlForLogging(url).utf8().data());
+    }
+#endif
+    
+    // We should only consider a <source> element when there is not src attribute at all.
+    if (hasAttribute(srcAttr))
+        return;
+
+    // 4.8.8 - If a source element is inserted as a child of a media element that has no src 
+    // attribute and whose networkState has the value NETWORK_EMPTY, the user agent must invoke 
+    // the media element's resource selection algorithm.
+    if (networkState() == HTMLMediaElement::NETWORK_EMPTY) {
+        scheduleLoad();
+        return;
+    }
+
+    if (m_currentSourceNode && source == m_currentSourceNode->nextSibling()) {
+        LOG(Media, "HTMLMediaElement::sourceWasAdded - <source> inserted immediately after current source");
+        m_nextChildNodeToConsider = source;
+        return;
+    }
+
+    if (m_nextChildNodeToConsider != sourceChildEndOfListValue())
+        return;
+    
+    // 4.8.9.5, resource selection algorithm, source elements section:
+    // 20 - Wait until the node after pointer is a node other than the end of the list. (This step might wait forever.)
+    // 21 - Asynchronously await a stable state...
+    // 22 - Set the element's delaying-the-load-event flag back to true (this delays the load event again, in case 
+    // it hasn't been fired yet).
+    setShouldDelayLoadEvent(true);
+
+    // 23 - Set the networkState back to NETWORK_LOADING.
+    m_networkState = NETWORK_LOADING;
+    
+    // 24 - Jump back to the find next candidate step above.
+    m_nextChildNodeToConsider = source;
+    scheduleNextSourceChild();
+}
+
+void HTMLMediaElement::sourceWillBeRemoved(HTMLSourceElement* source)
+{
+    LOG(Media, "HTMLMediaElement::sourceWillBeRemoved(%p)", source);
+
+#if !LOG_DISABLED
+    if (source->hasTagName(sourceTag)) {
+        KURL url = source->getNonEmptyURLAttribute(srcAttr);
+        LOG(Media, "HTMLMediaElement::sourceWillBeRemoved - 'src' is %s", urlForLogging(url).utf8().data());
+    }
+#endif
+
+    if (source != m_currentSourceNode && source != m_nextChildNodeToConsider)
+        return;
+
+    if (source == m_nextChildNodeToConsider) {
+        m_nextChildNodeToConsider = m_nextChildNodeToConsider->nextSibling();
+        if (!m_nextChildNodeToConsider)
+            m_nextChildNodeToConsider = sourceChildEndOfListValue();
+        LOG(Media, "HTMLMediaElement::sourceRemoved - m_nextChildNodeToConsider set to %p", m_nextChildNodeToConsider);
+    } else if (source == m_currentSourceNode) {
+        // Clear the current source node pointer, but don't change the movie as the spec says:
+        // 4.8.8 - Dynamically modifying a source element and its attribute when the element is already 
+        // inserted in a video or audio element will have no effect.
+        m_currentSourceNode = 0;
+        LOG(Media, "HTMLMediaElement::sourceRemoved - m_currentSourceNode set to 0");
+    }
+}
+
+void HTMLMediaElement::mediaPlayerTimeChanged(MediaPlayer*)
+{
+    LOG(Media, "HTMLMediaElement::mediaPlayerTimeChanged");
+
+    beginProcessingMediaPlayerCallback();
+
+    invalidateCachedTime();
+
+    // 4.8.10.9 step 14 & 15.  Needed if no ReadyState change is associated with the seek.
+    if (m_seeking && m_readyState >= HAVE_CURRENT_DATA)
+        finishSeek();
+    
+    // Always call scheduleTimeupdateEvent when the media engine reports a time discontinuity, 
+    // it will only queue a 'timeupdate' event if we haven't already posted one at the current
+    // movie time.
+    scheduleTimeupdateEvent(false);
+
+    float now = currentTime();
+    float dur = duration();
+    if (!isnan(dur) && dur && now >= dur) {
+        if (loop()) {
+            ExceptionCode ignoredException;
+            m_sentEndEvent = false;
+            seek(0, ignoredException);
+        } else {
+            if (!m_sentEndEvent) {
+                m_sentEndEvent = true;
+                scheduleEvent(eventNames().endedEvent);
+            }
+        }
+    }
+    else
+        m_sentEndEvent = false;
+
+    updatePlayState();
+    endProcessingMediaPlayerCallback();
+}
+
+void HTMLMediaElement::mediaPlayerVolumeChanged(MediaPlayer*)
+{
+    LOG(Media, "HTMLMediaElement::mediaPlayerVolumeChanged");
+
+    beginProcessingMediaPlayerCallback();
+    if (m_player)
+        m_volume = m_player->volume();
+    updateVolume();
+    endProcessingMediaPlayerCallback();
+}
+
+void HTMLMediaElement::mediaPlayerMuteChanged(MediaPlayer*)
+{
+    LOG(Media, "HTMLMediaElement::mediaPlayerMuteChanged");
+
+    beginProcessingMediaPlayerCallback();
+    if (m_player)
+        setMuted(m_player->muted());
+    endProcessingMediaPlayerCallback();
+}
+
+void HTMLMediaElement::mediaPlayerDurationChanged(MediaPlayer*)
+{
+    LOG(Media, "HTMLMediaElement::mediaPlayerDurationChanged");
+
+    beginProcessingMediaPlayerCallback();
+    scheduleEvent(eventNames().durationchangeEvent);
+    if (renderer())
+        renderer()->updateFromElement();
+    endProcessingMediaPlayerCallback();
+}
+
+void HTMLMediaElement::mediaPlayerRateChanged(MediaPlayer*)
+{
+    LOG(Media, "HTMLMediaElement::mediaPlayerRateChanged");
+
+    beginProcessingMediaPlayerCallback();
+
+    invalidateCachedTime();
+
+    // Stash the rate in case the one we tried to set isn't what the engine is
+    // using (eg. it can't handle the rate we set)
+    m_playbackRate = m_player->rate();
+    endProcessingMediaPlayerCallback();
+}
+
+void HTMLMediaElement::mediaPlayerPlaybackStateChanged(MediaPlayer*)
+{
+    LOG(Media, "HTMLMediaElement::mediaPlayerPlaybackStateChanged");
+
+    if (!m_player)
+        return;
+
+    beginProcessingMediaPlayerCallback();
+    if (m_player->paused())
+        pauseInternal();
+    else
+        playInternal();
+    endProcessingMediaPlayerCallback();
+}
+
+void HTMLMediaElement::mediaPlayerSawUnsupportedTracks(MediaPlayer*)
+{
+    LOG(Media, "HTMLMediaElement::mediaPlayerSawUnsupportedTracks");
+
+    // The MediaPlayer came across content it cannot completely handle.
+    // This is normally acceptable except when we are in a standalone
+    // MediaDocument. If so, tell the document what has happened.
+    if (ownerDocument()->isMediaDocument()) {
+        MediaDocument* mediaDocument = static_cast<MediaDocument*>(ownerDocument());
+        mediaDocument->mediaElementSawUnsupportedTracks();
+    }
+}
+
+// MediaPlayerPresentation methods
+void HTMLMediaElement::mediaPlayerRepaint(MediaPlayer*)
+{
+    beginProcessingMediaPlayerCallback();
+    updateDisplayState();
+    if (renderer())
+        renderer()->repaint();
+    endProcessingMediaPlayerCallback();
+}
+
+void HTMLMediaElement::mediaPlayerSizeChanged(MediaPlayer*)
+{
+    LOG(Media, "HTMLMediaElement::mediaPlayerSizeChanged");
+
+    beginProcessingMediaPlayerCallback();
+    if (renderer())
+        renderer()->updateFromElement();
+    endProcessingMediaPlayerCallback();
+}
+
+#if USE(ACCELERATED_COMPOSITING)
+bool HTMLMediaElement::mediaPlayerRenderingCanBeAccelerated(MediaPlayer*)
+{
+    if (renderer() && renderer()->isVideo()) {
+        ASSERT(renderer()->view());
+        return renderer()->view()->compositor()->canAccelerateVideoRendering(toRenderVideo(renderer()));
+    }
+    return false;
+}
+
+void HTMLMediaElement::mediaPlayerRenderingModeChanged(MediaPlayer*)
+{
+    LOG(Media, "HTMLMediaElement::mediaPlayerRenderingModeChanged");
+
+    // Kick off a fake recalcStyle that will update the compositing tree.
+    setNeedsStyleRecalc(SyntheticStyleChange);
+}
+#endif
+
+void HTMLMediaElement::mediaPlayerEngineUpdated(MediaPlayer*)
+{
+    beginProcessingMediaPlayerCallback();
+    LOG(Media, "HTMLMediaElement::mediaPlayerEngineUpdated");
+    if (renderer())
+        renderer()->updateFromElement();
+    endProcessingMediaPlayerCallback();
+}
+
+PassRefPtr<TimeRanges> HTMLMediaElement::buffered() const
+{
+    if (!m_player)
+        return TimeRanges::create();
+    return m_player->buffered();
+}
+
+PassRefPtr<TimeRanges> HTMLMediaElement::played()
+{
+    if (m_playing) {
+        float time = currentTime();
+        if (time > m_lastSeekTime)
+            addPlayedRange(m_lastSeekTime, time);
+    }
+
+    if (!m_playedTimeRanges)
+        m_playedTimeRanges = TimeRanges::create();
+
+    return m_playedTimeRanges->copy();
+}
+
+PassRefPtr<TimeRanges> HTMLMediaElement::seekable() const
+{
+    // FIXME real ranges support
+    if (!maxTimeSeekable())
+        return TimeRanges::create();
+    return TimeRanges::create(minTimeSeekable(), maxTimeSeekable());
+}
+
+bool HTMLMediaElement::potentiallyPlaying() const
+{
+    // "pausedToBuffer" means the media engine's rate is 0, but only because it had to stop playing
+    // when it ran out of buffered data. A movie is this state is "potentially playing", modulo the
+    // checks in couldPlayIfEnoughData().
+    bool pausedToBuffer = m_readyStateMaximum >= HAVE_FUTURE_DATA && m_readyState < HAVE_FUTURE_DATA;
+    return (pausedToBuffer || m_readyState >= HAVE_FUTURE_DATA) && couldPlayIfEnoughData();
+}
+
+bool HTMLMediaElement::couldPlayIfEnoughData() const
+{
+    return !paused() && !endedPlayback() && !stoppedDueToErrors() && !pausedForUserInteraction();
+}
+
+bool HTMLMediaElement::endedPlayback() const
+{
+    float dur = duration();
+    if (!m_player || isnan(dur))
+        return false;
+
+    // 4.8.10.8 Playing the media resource
+
+    // A media element is said to have ended playback when the element's 
+    // readyState attribute is HAVE_METADATA or greater, 
+    if (m_readyState < HAVE_METADATA)
+        return false;
+
+    // and the current playback position is the end of the media resource and the direction
+    // of playback is forwards and the media element does not have a loop attribute specified,
+    float now = currentTime();
+    if (m_playbackRate > 0)
+        return dur > 0 && now >= dur && !loop();
+
+    // or the current playback position is the earliest possible position and the direction 
+    // of playback is backwards
+    if (m_playbackRate < 0)
+        return now <= 0;
+
+    return false;
+}
+
+bool HTMLMediaElement::stoppedDueToErrors() const
+{
+    if (m_readyState >= HAVE_METADATA && m_error) {
+        RefPtr<TimeRanges> seekableRanges = seekable();
+        if (!seekableRanges->contain(currentTime()))
+            return true;
+    }
+    
+    return false;
+}
+
+bool HTMLMediaElement::pausedForUserInteraction() const
+{
+//    return !paused() && m_readyState >= HAVE_FUTURE_DATA && [UA requires a decitions from the user]
+    return false;
+}
+
+float HTMLMediaElement::minTimeSeekable() const
+{
+    return 0;
+}
+
+float HTMLMediaElement::maxTimeSeekable() const
+{
+    return m_player ? m_player->maxTimeSeekable() : 0;
+}
+    
+void HTMLMediaElement::updateVolume()
+{
+    if (!m_player)
+        return;
+
+    // Avoid recursion when the player reports volume changes.
+    if (!processingMediaPlayerCallback()) {
+        Page* page = document()->page();
+        float volumeMultiplier = page ? page->mediaVolume() : 1;
+    
+        m_player->setMuted(m_muted);
+        m_player->setVolume(m_volume * volumeMultiplier);
+    }
+    
+    if (renderer())
+        renderer()->updateFromElement();
+}
+
+void HTMLMediaElement::updatePlayState()
+{
+    if (!m_player)
+        return;
+
+    if (m_pausedInternal) {
+        if (!m_player->paused())
+            m_player->pause();
+        refreshCachedTime();
+        m_playbackProgressTimer.stop();
+        return;
+    }
+    
+    bool shouldBePlaying = potentiallyPlaying();
+    bool playerPaused = m_player->paused();
+
+    LOG(Media, "HTMLMediaElement::updatePlayState - shouldBePlaying = %s, playerPaused = %s", 
+        boolString(shouldBePlaying), boolString(playerPaused));
+
+    if (shouldBePlaying) {
+        setDisplayMode(Video);
+        invalidateCachedTime();
+
+        if (playerPaused) {
+            if (!m_isFullscreen && isVideo() && document() && document()->page() && document()->page()->chrome()->requiresFullscreenForVideoPlayback())
+                enterFullscreen();
+
+            // Set rate before calling play in case the rate was set before the media engine was setup.
+            // The media engine should just stash the rate since it isn't already playing.
+            m_player->setRate(m_playbackRate);
+            m_player->play();
+        }
+
+        startPlaybackProgressTimer();
+        m_playing = true;
+
+    } else { // Should not be playing right now
+        if (!playerPaused)
+            m_player->pause();
+        refreshCachedTime();
+
+        m_playbackProgressTimer.stop();
+        m_playing = false;
+        float time = currentTime();
+        if (time > m_lastSeekTime)
+            addPlayedRange(m_lastSeekTime, time);
+
+        if (couldPlayIfEnoughData())
+            m_player->prepareToPlay();
+    }
+    
+    if (renderer())
+        renderer()->updateFromElement();
+}
+    
+void HTMLMediaElement::setPausedInternal(bool b)
+{
+    m_pausedInternal = b;
+    updatePlayState();
+}
+
+void HTMLMediaElement::stopPeriodicTimers()
+{
+    m_progressEventTimer.stop();
+    m_playbackProgressTimer.stop();
+}
+
+void HTMLMediaElement::userCancelledLoad()
+{
+    LOG(Media, "HTMLMediaElement::userCancelledLoad");
+
+    if (m_networkState == NETWORK_EMPTY || m_completelyLoaded)
+        return;
+
+    // If the media data fetching process is aborted by the user:
+
+    // 1 - The user agent should cancel the fetching process.
+#if !ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    m_player.clear();
+#endif
+    stopPeriodicTimers();
+    m_loadState = WaitingForSource;
+
+    // 2 - Set the error attribute to a new MediaError object whose code attribute is set to MEDIA_ERR_ABORTED.
+    m_error = MediaError::create(MediaError::MEDIA_ERR_ABORTED);
+
+    // 3 - Queue a task to fire a simple event named error at the media element.
+    scheduleEvent(eventNames().abortEvent);
+
+    // 4 - If the media element's readyState attribute has a value equal to HAVE_NOTHING, set the 
+    // element's networkState attribute to the NETWORK_EMPTY value and queue a task to fire a 
+    // simple event named emptied at the element. Otherwise, set the element's networkState 
+    // attribute to the NETWORK_IDLE value.
+    if (m_readyState == HAVE_NOTHING) {
+        m_networkState = NETWORK_EMPTY;
+        scheduleEvent(eventNames().emptiedEvent);
+    }
+    else
+        m_networkState = NETWORK_IDLE;
+
+    // 5 - Set the element's delaying-the-load-event flag to false. This stops delaying the load event.
+    setShouldDelayLoadEvent(false);
+
+    // 6 - Abort the overall resource selection algorithm.
+    m_currentSourceNode = 0;
+
+    // Reset m_readyState since m_player is gone.
+    m_readyState = HAVE_NOTHING;
+}
+
+bool HTMLMediaElement::canSuspend() const
+{
+    return true; 
+}
+
+void HTMLMediaElement::stop()
+{
+    LOG(Media, "HTMLMediaElement::stop");
+    if (m_isFullscreen)
+        exitFullscreen();
+    
+    m_inActiveDocument = false;
+    userCancelledLoad();
+    
+    // Stop the playback without generating events
+    setPausedInternal(true);
+    
+    if (renderer())
+        renderer()->updateFromElement();
+    
+    stopPeriodicTimers();
+    cancelPendingEventsAndCallbacks();
+}
+
+void HTMLMediaElement::suspend(ReasonForSuspension why)
+{
+    LOG(Media, "HTMLMediaElement::suspend");
+    
+    switch (why)
+    {
+        case DocumentWillBecomeInactive:
+            stop();
+            break;
+        case JavaScriptDebuggerPaused:
+        case WillShowDialog:
+            // Do nothing, we don't pause media playback in these cases.
+            break;
+    }
+}
+
+void HTMLMediaElement::resume()
+{
+    LOG(Media, "HTMLMediaElement::resume");
+
+    m_inActiveDocument = true;
+    setPausedInternal(false);
+
+    if (m_error && m_error->code() == MediaError::MEDIA_ERR_ABORTED) {
+        // Restart the load if it was aborted in the middle by moving the document to the page cache.
+        // m_error is only left at MEDIA_ERR_ABORTED when the document becomes inactive (it is set to
+        //  MEDIA_ERR_ABORTED while the abortEvent is being sent, but cleared immediately afterwards).
+        // This behavior is not specified but it seems like a sensible thing to do.
+        ExceptionCode ec;
+        load(processingUserGesture(), ec);
+    }
+
+    if (renderer())
+        renderer()->updateFromElement();
+}
+
+bool HTMLMediaElement::hasPendingActivity() const
+{
+    // Return true when we have pending events so we can't fire events after the JS 
+    // object gets collected.
+    bool pending = m_pendingEvents.size();
+    LOG(Media, "HTMLMediaElement::hasPendingActivity -> %s", boolString(pending));
+    return pending;
+}
+
+void HTMLMediaElement::mediaVolumeDidChange()
+{
+    LOG(Media, "HTMLMediaElement::mediaVolumeDidChange");
+    updateVolume();
+}
+
+void HTMLMediaElement::defaultEventHandler(Event* event)
+{
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    RenderObject* r = renderer();
+    if (!r || !r->isWidget())
+        return;
+
+    Widget* widget = toRenderWidget(r)->widget();
+    if (widget)
+        widget->handleEvent(event);
+#else
+    if (renderer() && renderer()->isMedia())
+        toRenderMedia(renderer())->forwardEvent(event);
+    if (event->defaultHandled())
+        return;
+    HTMLElement::defaultEventHandler(event);
+#endif
+}
+
+bool HTMLMediaElement::processingUserGesture() const
+{
+    Frame* frame = document()->frame();
+    FrameLoader* loader = frame ? frame->loader() : 0;
+
+    // return 'true' for safety if we don't know the answer 
+    return loader ? loader->isProcessingUserGesture() : true;
+}
+
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+
+void HTMLMediaElement::ensureMediaPlayer()
+{
+    if (!m_player)
+        m_player = MediaPlayer::create(this);
+}
+
+void HTMLMediaElement::deliverNotification(MediaPlayerProxyNotificationType notification)
+{
+    if (notification == MediaPlayerNotificationPlayPauseButtonPressed) {
+        togglePlayState();
+        return;
+    }
+
+    if (m_player)
+        m_player->deliverNotification(notification);
+}
+
+void HTMLMediaElement::setMediaPlayerProxy(WebMediaPlayerProxy* proxy)
+{
+    ensureMediaPlayer();
+    m_player->setMediaPlayerProxy(proxy);
+}
+
+void HTMLMediaElement::getPluginProxyParams(KURL& url, Vector<String>& names, Vector<String>& values)
+{
+    Frame* frame = document()->frame();
+    FrameLoader* loader = frame ? frame->loader() : 0;
+
+    if (isVideo()) {
+        KURL posterURL = getNonEmptyURLAttribute(posterAttr);
+        if (!posterURL.isEmpty() && loader && loader->willLoadMediaElementURL(posterURL)) {
+            names.append("_media_element_poster_");
+            values.append(posterURL.string());
+        }
+    }
+
+    if (controls()) {
+        names.append("_media_element_controls_");
+        values.append("true");
+    }
+
+    url = src();
+    if (!isSafeToLoadURL(url, Complain))
+        url = selectNextSourceChild(0, DoNothing);
+
+    m_currentSrc = url.string();
+    if (url.isValid() && loader && loader->willLoadMediaElementURL(url)) {
+        names.append("_media_element_src_");
+        values.append(m_currentSrc);
+    }
+}
+
+void HTMLMediaElement::finishParsingChildren()
+{
+    HTMLElement::finishParsingChildren();
+    document()->updateStyleIfNeeded();
+    createMediaPlayerProxy();
+}
+
+void HTMLMediaElement::createMediaPlayerProxy()
+{
+    ensureMediaPlayer();
+
+    if (m_proxyWidget || (inDocument() && !m_needWidgetUpdate))
+        return;
+
+    Frame* frame = document()->frame();
+    FrameLoader* loader = frame ? frame->loader() : 0;
+    if (!loader)
+        return;
+
+    LOG(Media, "HTMLMediaElement::createMediaPlayerProxy");
+
+    KURL url;
+    Vector<String> paramNames;
+    Vector<String> paramValues;
+
+    getPluginProxyParams(url, paramNames, paramValues);
+    
+    // Hang onto the proxy widget so it won't be destroyed if the plug-in is set to
+    // display:none
+    m_proxyWidget = loader->subframeLoader()->loadMediaPlayerProxyPlugin(this, url, paramNames, paramValues);
+    if (m_proxyWidget)
+        m_needWidgetUpdate = false;
+}
+
+void HTMLMediaElement::updateWidget(bool)
+{
+    mediaElement->setNeedWidgetUpdate(false);
+
+    Vector<String> paramNames;
+    Vector<String> paramValues;
+    KURL kurl;
+    
+    mediaElement->getPluginProxyParams(kurl, paramNames, paramValues);
+    SubframeLoader* loader = document()->frame()->loader()->subframeLoader();
+    loader->loadMediaPlayerProxyPlugin(mediaElement, kurl, paramNames, paramValues);
+}
+
+#endif // ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+
+void HTMLMediaElement::enterFullscreen()
+{
+    LOG(Media, "HTMLMediaElement::enterFullscreen");
+
+    ASSERT(!m_isFullscreen);
+    m_isFullscreen = true;
+    if (document() && document()->page()) {
+        document()->page()->chrome()->client()->enterFullscreenForNode(this);
+        scheduleEvent(eventNames().webkitbeginfullscreenEvent);
+    }
+}
+
+void HTMLMediaElement::exitFullscreen()
+{
+    LOG(Media, "HTMLMediaElement::exitFullscreen");
+
+    ASSERT(m_isFullscreen);
+    m_isFullscreen = false;
+    if (document() && document()->page()) {
+        if (document()->page()->chrome()->requiresFullscreenForVideoPlayback())
+            pauseInternal();
+        document()->page()->chrome()->client()->exitFullscreenForNode(this);
+        scheduleEvent(eventNames().webkitendfullscreenEvent);
+    }
+}
+
+PlatformMedia HTMLMediaElement::platformMedia() const
+{
+    return m_player ? m_player->platformMedia() : NoPlatformMedia;
+}
+
+#if USE(ACCELERATED_COMPOSITING)
+PlatformLayer* HTMLMediaElement::platformLayer() const
+{
+    return m_player ? m_player->platformLayer() : 0;
+}
+#endif
+
+bool HTMLMediaElement::hasClosedCaptions() const
+{
+    return m_player && m_player->hasClosedCaptions();
+}
+
+bool HTMLMediaElement::closedCaptionsVisible() const
+{
+    return m_closedCaptionsVisible;
+}
+
+void HTMLMediaElement::setClosedCaptionsVisible(bool closedCaptionVisible)
+{
+    LOG(Media, "HTMLMediaElement::setClosedCaptionsVisible(%s)", boolString(closedCaptionVisible));
+
+    if (!m_player ||!hasClosedCaptions())
+        return;
+
+    m_closedCaptionsVisible = closedCaptionVisible;
+    m_player->setClosedCaptionsVisible(closedCaptionVisible);
+    if (renderer())
+        renderer()->updateFromElement();
+}
+
+void HTMLMediaElement::setWebkitClosedCaptionsVisible(bool visible)
+{
+    setClosedCaptionsVisible(visible);
+}
+
+bool HTMLMediaElement::webkitClosedCaptionsVisible() const
+{
+    return closedCaptionsVisible();
+}
+
+
+bool HTMLMediaElement::webkitHasClosedCaptions() const
+{
+    return hasClosedCaptions();
+}
+
+void HTMLMediaElement::mediaCanStart()
+{
+    LOG(Media, "HTMLMediaElement::mediaCanStart");
+
+    ASSERT(m_isWaitingUntilMediaCanStart);
+    m_isWaitingUntilMediaCanStart = false;
+    loadInternal();
+}
+
+bool HTMLMediaElement::isURLAttribute(Attribute* attribute) const
+{
+    return attribute->name() == srcAttr;
+}
+
+void HTMLMediaElement::setShouldDelayLoadEvent(bool shouldDelay)
+{
+    if (m_shouldDelayLoadEvent == shouldDelay)
+        return;
+
+    LOG(Media, "HTMLMediaElement::setShouldDelayLoadEvent(%s)", boolString(shouldDelay));
+
+    m_shouldDelayLoadEvent = shouldDelay;
+    if (shouldDelay)
+        document()->incrementLoadEventDelayCount();
+    else
+        document()->decrementLoadEventDelayCount();
+}
+    
+}
+
+#endif