Add WebKit prefix to MediaSource,SourceBuffer, and SourceBufferList objects.

Source/core/platform/graphics/MediaPlayerPrivate.h

 /*
  * Copyright (C) 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 25 matching lines @@
 class IntSize;
 class PlatformTextTrack;
 
 class MediaPlayerPrivateInterface {
     WTF_MAKE_NONCOPYABLE(MediaPlayerPrivateInterface); WTF_MAKE_FAST_ALLOCATED;
 public:
     MediaPlayerPrivateInterface() { }
     virtual ~MediaPlayerPrivateInterface() { }
 
     virtual void load(const String& url) = 0;
-    virtual void load(const String& url, PassRefPtr<MediaSource>) = 0;
+    virtual void load(const String& url, PassRefPtr<WebKitMediaSource>) = 0;
     virtual void cancelLoad() = 0;
 
     virtual void prepareToPlay() { }
     virtual PlatformMedia platformMedia() const { return NoPlatformMedia; }
     virtual PlatformLayer* platformLayer() const { return 0; }
 
     virtual void play() = 0;
     virtual void pause() = 0;
 
     virtual bool supportsFullscreen() const { return false; }
@@ skipping 107 matching lines @@
 #if USE(PLATFORM_TEXT_TRACK_MENU)
     virtual bool implementsTextTrackControls() const { return false; }
     virtual PassRefPtr<PlatformTextTrackMenuInterface> textTrackMenu() { return 0; }
 #endif
 
 };
 
 }
 
 #endif