Enable seek in fullscreen mode for MSE impl on android

media/base/android/media_player_android.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_ANDROID_MEDIA_PLAYER_ANDROID_H_
 #define MEDIA_BASE_ANDROID_MEDIA_PLAYER_ANDROID_H_
 
 #include <jni.h>
 #include <string>
 
@@ skipping 66 matching lines @@
   virtual bool CanSeekBackward() = 0;
 
   // Methods for DeumxerStreamPlayer.
   // Informs DemuxerStreamPlayer that the demuxer is ready.
   virtual void DemuxerReady(
       const MediaPlayerHostMsg_DemuxerReady_Params& params);
   // Called when the requested data is received from the demuxer.
   virtual void ReadFromDemuxerAck(
       const MediaPlayerHostMsg_ReadFromDemuxerAck_Params& params);
 
+  // Called when a seek request is acked by the render process.
+  virtual void OnSeekRequestAck();
+
   int player_id() { return player_id_; }
 
  protected:
   MediaPlayerAndroid(int player_id,
                      MediaPlayerManager* manager);
 
   // Called when player status changes.
   virtual void OnMediaError(int error_type);
   virtual void OnVideoSizeChanged(int width, int height);
   virtual void OnBufferingUpdate(int percent);
@@ skipping 16 matching lines @@
 
   // Resource manager for all the media players.
   MediaPlayerManager* manager_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaPlayerAndroid);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_PLAYER_ANDROID_H_