Eliminate MediaPlayer abstraction(network state)

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 104 matching lines @@
     virtual double duration() const = 0;
 
     virtual double currentTime() const = 0;
 
     virtual void seek(double) = 0;
 
     virtual bool seeking() const = 0;
 
     virtual void setPoster(const KURL&) = 0;
 
-    enum NetworkState { Empty, Idle, Loading, Loaded, FormatError, NetworkError, DecodeError };
-    virtual NetworkState networkState() const = 0;
-
     virtual void paint(GraphicsContext*, const IntRect&) = 0;
     virtual bool copyVideoTextureToPlatformTexture(blink::WebGraphicsContext3D*, Platform3DObject, GC3Dint, GC3Denum, GC3Denum, bool, bool) = 0;
 
     enum Preload { None, MetaData, Auto };
     virtual void setPreload(Preload) = 0;
 
 #if ENABLE(WEB_AUDIO)
     virtual AudioSourceProvider* audioSourceProvider() = 0;
 #endif
     virtual blink::WebMediaPlayer* webMediaPlayer() const = 0;
 };
 
 }
 
 #endif // MediaPlayer_h