Oilpan: prevent player from accessing its media element during finalization

Source/platform/graphics/media/MediaPlayer.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 77 matching lines @@
 
     // the movie size has changed
     virtual void mediaPlayerSizeChanged() = 0;
 
     virtual void mediaPlayerSetWebLayer(blink::WebLayer*) = 0;
 
     virtual void mediaPlayerDidAddTextTrack(blink::WebInbandTextTrack*) = 0;
     virtual void mediaPlayerDidRemoveTextTrack(blink::WebInbandTextTrack*) = 0;
 
     virtual void mediaPlayerMediaSourceOpened(blink::WebMediaSource*) = 0;
+
 };
 
 typedef PassOwnPtr<MediaPlayer> (*CreateMediaEnginePlayer)(MediaPlayerClient*);
 
 class PLATFORM_EXPORT MediaPlayer {
     WTF_MAKE_NONCOPYABLE(MediaPlayer);
 public:
     static PassOwnPtr<MediaPlayer> create(MediaPlayerClient*);
     static void setMediaEngineCreateFunction(CreateMediaEnginePlayer);
 
     static double invalidTime() { return -1.0; }
 
     MediaPlayer() { }
     virtual ~MediaPlayer() { }
 
+    virtual void detach() = 0;
+
     virtual void load(blink::WebMediaPlayer::LoadType, const String& url, blink::WebMediaPlayer::CORSMode) = 0;
 
     virtual void play() = 0;
     virtual void pause() = 0;
 
     virtual bool supportsSave() const = 0;
 
     virtual double duration() const = 0;
 
     virtual double currentTime() const = 0;
@@ skipping 33 matching lines @@
     virtual bool hasSingleSecurityOrigin() const = 0;
 
     // Time value in the movie's time scale. It is only necessary to override this if the media
     // engine uses rational numbers to represent media time.
     virtual double mediaTimeForTimeValue(double timeValue) const = 0;
 
 #if ENABLE(WEB_AUDIO)
     virtual AudioSourceProvider* audioSourceProvider() = 0;
 #endif
     virtual blink::WebMediaPlayer* webMediaPlayer() const = 0;
+
 };
 
 }
 
 #endif // MediaPlayer_h