Implement AudioTrack, AudioTrackList, VideoTrack, and VideoTrackList

public/platform/WebMediaPlayer.h

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 77 matching lines @@
         CORSModeAnonymous,
         CORSModeUseCredentials,
     };
 
     enum LoadType {
         LoadTypeURL,
         LoadTypeMediaSource,
         LoadTypeMediaStream,
     };
 
+    typedef unsigned TrackId;
+
     virtual ~WebMediaPlayer() { }
 
     virtual void load(LoadType, const WebURL&, CORSMode) = 0;
 
     // Playback controls.
     virtual void play() = 0;
     virtual void pause() = 0;
     virtual bool supportsSave() const = 0;
     virtual void seek(double seconds) = 0;
     virtual void setRate(double) = 0;
@@ skipping 47 matching lines @@
     virtual void setContentDecryptionModule(WebContentDecryptionModule* cdm) { }
 
     // Sets the poster image URL.
     virtual void setPoster(const WebURL& poster) { }
 
     // Instruct WebMediaPlayer to enter/exit fullscreen.
     virtual void enterFullscreen() { }
     virtual void exitFullscreen() { }
     // Returns true if the player can enter fullscreen.
     virtual bool canEnterFullscreen() const { return false; }
+
+    virtual void enabledAudioTracksChanged(const WebVector<TrackId>& enabledTrackIds) { }
+    virtual void selectedVideoTrackChanged(TrackId* selectedTrackId) { }
 };
 
 } // namespace blink
 
 #endif