Oilpan: prevent player from accessing its media element during finalization

Source/core/html/HTMLMediaElement.h

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 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
@@ skipping 256 matching lines @@
 
     MediaController* controller() const;
     void setController(PassRefPtr<MediaController>); // Resets the MediaGroup and sets the MediaController.
 
     void scheduleEvent(PassRefPtrWillBeRawPtr<Event>);
 
     // Current volume that should be used by the webMediaPlayer(). This method takes muted state
     // and m_mediaController multipliers into account.
     double playerVolume() const;
 
+#if ENABLE(OILPAN)
+    bool isFinalizing() const { return m_isFinalizing; }
+#endif
+
 protected:
     HTMLMediaElement(const QualifiedName&, Document&);
     virtual ~HTMLMediaElement();
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual void finishParsingChildren() OVERRIDE FINAL;
     virtual bool isURLAttribute(const Attribute&) const OVERRIDE;
     virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
 
     virtual void didMoveToNewDocument(Document& oldDocument) OVERRIDE;
@@ skipping 208 matching lines @@
 
     bool m_closedCaptionsVisible : 1;
 
     bool m_completelyLoaded : 1;
     bool m_havePreparedToPlay : 1;
     bool m_delayingLoadForPreloadNone : 1;
 
     bool m_tracksAreReady : 1;
     bool m_haveVisibleTextTrack : 1;
     bool m_processingPreferenceChange : 1;
+#if ENABLE(OILPAN)
+    bool m_isFinalizing : 1;
+#endif
     double m_lastTextTrackUpdateTime;
 
     RefPtrWillBeMember<TextTrackList> m_textTracks;
     WillBeHeapVector<RefPtrWillBeMember<TextTrack> > m_textTracksWhenResourceSelectionBegan;
 
     CueIntervalTree m_cueTree;
 
     CueList m_currentlyActiveCues;
     int m_ignoreTrackDisplayUpdate;
 
@@ skipping 38 matching lines @@
 inline bool isHTMLMediaElement(const HTMLElement& element)
 {
     return isHTMLAudioElement(element) || isHTMLVideoElement(element);
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLMediaElement);
 
 } //namespace
 
 #endif