Support earliest seekable time in WMPI.

third_party/WebKit/public/platform/WebMediaPlayer.h

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 124 matching lines @@
 
     // True if the media is being played on a remote device.
     virtual bool isRemote() const { return false; }
 
     // Dimension of the video.
     virtual WebSize naturalSize() const = 0;
 
     // Getters of playback state.
     virtual bool paused() const = 0;
     virtual bool seeking() const = 0;
+    virtual double earliestTime() const = 0;
     virtual double duration() const = 0;
     virtual double currentTime() const = 0;
 
     // Internal states of loading and network.
     virtual NetworkState networkState() const = 0;
     virtual ReadyState readyState() const = 0;
 
     virtual bool didLoadingProgress() = 0;
 
     virtual bool hasSingleSecurityOrigin() const = 0;
@@ skipping 42 matching lines @@
     virtual void enterFullscreen() { }
 
     virtual void enabledAudioTracksChanged(const WebVector<TrackId>& enabledTrackIds) { }
     // |selectedTrackId| is null if no track is selected.
     virtual void selectedVideoTrackChanged(TrackId* selectedTrackId) { }
 };
 
 } // namespace blink
 
 #endif