Clean forward declaration in public

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 23 matching lines @@
 #include "WebCanvas.h"
 #include "WebContentDecryptionModule.h"
 #include "WebMediaSource.h"
 #include "WebString.h"
 #include "WebTimeRange.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 
 namespace blink {
 
 class WebAudioSourceProvider;
-class WebAudioSourceProviderClient;
 class WebContentDecryptionModule;
-class WebMediaPlayerClient;
 class WebString;
 class WebURL;
 struct WebRect;
 struct WebSize;
 class WebGraphicsContext3D;
 
 class WebMediaPlayer {
 public:
     enum NetworkState {
         NetworkStateEmpty,
@@ skipping 112 matching lines @@
     virtual void enterFullscreen() { }
 
     virtual void enabledAudioTracksChanged(const WebVector<TrackId>& enabledTrackIds) { }
     // |selectedTrackId| is null if no track is selected.
     virtual void selectedVideoTrackChanged(TrackId* selectedTrackId) { }
 };
 
 } // namespace blink
 
 #endif