Enable seek in fullscreen mode for MSE impl on android

content/browser/android/media_player_manager_impl.h

Index: content/browser/android/media_player_manager_impl.h
diff --git a/content/browser/android/media_player_manager_impl.h b/content/browser/android/media_player_manager_impl.h
index 61c1557f416b0143e5e48d6adf961dddcf2ebb39..d1c9bb26f22d9008767fe9b84006b8be9291805a 100644
--- a/content/browser/android/media_player_manager_impl.h
+++ b/content/browser/android/media_player_manager_impl.h
@@ -73,6 +73,8 @@ class MediaPlayerManagerImpl
   virtual media::MediaPlayerAndroid* GetFullscreenPlayer() OVERRIDE;
   virtual media::MediaPlayerAndroid* GetPlayer(int player_id) OVERRIDE;
   virtual void DestroyAllMediaPlayers() OVERRIDE;
+  virtual void OnMediaSeekRequest(int player_id, base::TimeDelta time_to_seek,
+                                  bool request_surface) OVERRIDE;
 
 #if defined(GOOGLE_TV)
   void AttachExternalVideoSurface(int player_id, jobject surface);
@@ -105,6 +107,7 @@ class MediaPlayerManagerImpl
   void OnReadFromDemuxerAck(
       int player_id,
       const media::MediaPlayerHostMsg_ReadFromDemuxerAck_Params& params);
+  void OnMediaSeekRequestAck(int player_id);
 
 #if defined(GOOGLE_TV)
   void OnNotifyExternalSurface(