Eliminate MediaPlayer & MediaPlayerClient abstractions(seek, duration, poster APIs)

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 99 matching lines @@
     MediaPlayer() { }
     virtual ~MediaPlayer() { }
 
     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;
-
-    virtual void seek(double) = 0;
-
-    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;
-
     enum NetworkState { Empty, Idle, Loading, Loaded, FormatError, NetworkError, DecodeError };
     virtual NetworkState networkState() const = 0;
 
     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;
@@ skipping 12 matching lines @@
 
 #if ENABLE(WEB_AUDIO)
     virtual AudioSourceProvider* audioSourceProvider() = 0;
 #endif
     virtual blink::WebMediaPlayer* webMediaPlayer() const = 0;
 };
 
 }
 
 #endif // MediaPlayer_h