Remove MediaPlayer::invalidTime()

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 71 matching lines @@
 };
 
 typedef PassOwnPtr<MediaPlayer> (*CreateMediaEnginePlayer)(MediaPlayerClient*);
 
 class PLATFORM_EXPORT MediaPlayer {
     WTF_MAKE_NONCOPYABLE(MediaPlayer);
 public:
     static PassOwnPtr<MediaPlayer> create(MediaPlayerClient*);
     static void setMediaEngineCreateFunction(CreateMediaEnginePlayer);
 
-    static double invalidTime() { return -1.0; }
-
     MediaPlayer() { }
     virtual ~MediaPlayer() { }
 
     virtual void load(WebMediaPlayer::LoadType, const String& url, WebMediaPlayer::CORSMode) = 0;
 
     enum Preload { None, MetaData, Auto };
     virtual void setPreload(Preload) = 0;
 
 #if ENABLE(WEB_AUDIO)
     virtual AudioSourceProvider* audioSourceProvider() = 0;
 #endif
     virtual WebMediaPlayer* webMediaPlayer() const = 0;
 };
 
 } // namespace blink
 
 #endif // MediaPlayer_h