Eliminate MediaPlayer & MediaPlayerClient abstractions(rate, setRate and other APIs)

Source/platform/graphics/media/MediaPlayer.h

Index: Source/platform/graphics/media/MediaPlayer.h
diff --git a/Source/platform/graphics/media/MediaPlayer.h b/Source/platform/graphics/media/MediaPlayer.h
index a4d7ccdcac9f7590937e4603dd97d7403416489c..6d3f2612c8153f36ebcc9cfcadc903534c617be3 100644
--- a/Source/platform/graphics/media/MediaPlayer.h
+++ b/Source/platform/graphics/media/MediaPlayer.h
@@ -125,9 +125,6 @@ public:
 
     virtual bool seeking() const = 0;
 
-    virtual double rate() const = 0;
-    virtual void setRate(double) = 0;
-
     virtual bool paused() const = 0;
 
     virtual void setPoster(const KURL&) = 0;
@@ -138,11 +135,6 @@ public:
     enum ReadyState  { HaveNothing, HaveMetadata, HaveCurrentData, HaveFutureData, HaveEnoughData };
     virtual ReadyState readyState() const = 0;
 
-    virtual double maxTimeSeekable() const = 0;
-    virtual PassRefPtr<TimeRanges> buffered() const = 0;
-
-    virtual bool didLoadingProgress() const = 0;
-
     virtual void paint(GraphicsContext*, const IntRect&) = 0;
     virtual bool copyVideoTextureToPlatformTexture(blink::WebGraphicsContext3D*, Platform3DObject, GC3Dint, GC3Denum, GC3Denum, bool, bool) = 0;