Enable seek in fullscreen mode for MSE impl on android

media/base/android/media_source_player.h

Index: media/base/android/media_source_player.h
diff --git a/media/base/android/media_source_player.h b/media/base/android/media_source_player.h
index c6719504955f879b1cb935b7f796920cdd7686c5..626ff8ff23d925a6ebc8f5f15b07b8783f0d65ed 100644
--- a/media/base/android/media_source_player.h
+++ b/media/base/android/media_source_player.h
@@ -131,6 +131,7 @@ class MEDIA_EXPORT MediaSourcePlayer : public MediaPlayerAndroid {
   virtual bool CanSeekForward() OVERRIDE;
   virtual bool CanSeekBackward() OVERRIDE;
   virtual bool IsPlayerReady() OVERRIDE;
+  virtual void OnSeekRequestAck() OVERRIDE;
 
   // Called when the demuxer is ready.
   virtual void DemuxerReady(
@@ -141,11 +142,8 @@ class MEDIA_EXPORT MediaSourcePlayer : public MediaPlayerAndroid {
       const MediaPlayerHostMsg_ReadFromDemuxerAck_Params& params) OVERRIDE;
 
  private:
-  // Update the timestamps for A/V sync scheduling. |kickoff_time| keeps
-  // track of when the job is started. We need this to check if a seek is
-  // performed during decoding.
+  // Update the timestamps for A/V sync scheduling.
   void UpdateTimestamps(
-      const base::Time& kickoff_time,
       const base::TimeDelta& presentation_timestamp,
       const base::Time& wallclock_time);
 
@@ -157,8 +155,7 @@ class MEDIA_EXPORT MediaSourcePlayer : public MediaPlayerAndroid {
 
   // Called when the decoder finishes its task.
   void MediaDecoderCallback(
-        bool is_audio, const base::Time& kickoff_time,
-        const base::TimeDelta& presentation_timestamp,
+        bool is_audio, const base::TimeDelta& presentation_timestamp,
         const base::Time& wallclock_time, bool end_of_stream);
 
   // Called to decoder more data.
@@ -172,6 +169,12 @@ class MEDIA_EXPORT MediaSourcePlayer : public MediaPlayerAndroid {
   // Pending play event while player is preparing.
   bool pending_play_;
 
+  // Whether there is a pending seek request to send to the renderer.
+  bool pending_media_seek_request_;
+
+  // Number of active decoding tasks.
+  int active_decoding_tasks_;
+
   // Stats about the media.
   base::TimeDelta duration_;
   int width_;
@@ -195,7 +198,6 @@ class MEDIA_EXPORT MediaSourcePlayer : public MediaPlayerAndroid {
   // due to network or decoding problem.
   base::Time start_wallclock_time_;
   base::TimeDelta start_presentation_timestamp_;
-  base::Time last_seek_time_;
 
   // Decoder jobs
   ScopedMediaDecoderJob audio_decoder_job_;