Convert Filter::Seek() to use new callback system.

media/filters/ffmpeg_demuxer.h

 // Copyright (c) 2011 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.
 
 // Implements the Demuxer interface using FFmpeg's libavformat.  At this time
 // will support demuxing any audio/video format thrown at it.  The streams
 // output mime types audio/x-ffmpeg and video/x-ffmpeg and include an integer
 // key FFmpegCodecID which contains the CodecID enumeration value.  The CodecIDs
 // can be used to create and initialize the corresponding FFmpeg decoder.
 //
@@ skipping 124 matching lines @@
   virtual ~FFmpegDemuxer();
 
   // Posts a task to perform additional demuxing.
   virtual void PostDemuxTask();
 
   void Initialize(
       DataSource* data_source, PipelineStatusCallback* callback);
 
   // Filter implementation.
   virtual void Stop(FilterCallback* callback);
-  virtual void Seek(base::TimeDelta time, FilterCallback* callback);
+  virtual void Seek(base::TimeDelta time, const FilterStatusCB& cb);
   virtual void OnAudioRendererDisabled();
   virtual void set_host(FilterHost* filter_host);
   virtual void SetPlaybackRate(float playback_rate);
   virtual void SetPreload(Preload preload);
 
   // Demuxer implementation.
   virtual scoped_refptr<DemuxerStream> GetStream(DemuxerStream::Type type);
 
   // FFmpegProtocol implementation.
   virtual int Read(int size, uint8* data);
   virtual bool GetPosition(int64* position_out);
   virtual bool SetPosition(int64 position);
   virtual bool GetSize(int64* size_out);
   virtual bool IsStreaming();
 
   // Provide access to FFmpegDemuxerStream.
   MessageLoop* message_loop();
 
  private:
   // Only allow a factory to create this class.
   friend class MockFFmpegDemuxer;
   FRIEND_TEST_ALL_PREFIXES(FFmpegDemuxerTest, ProtocolRead);
 
   // Carries out initialization on the demuxer thread.
   void InitializeTask(
       DataSource* data_source, PipelineStatusCallback* callback);
 
   // Carries out a seek on the demuxer thread.
-  void SeekTask(base::TimeDelta time, FilterCallback* callback);
+  void SeekTask(base::TimeDelta time, const FilterStatusCB& cb);
 
   // Carries out demuxing and satisfying stream reads on the demuxer thread.
   void DemuxTask();
 
   // Carries out stopping the demuxer streams on the demuxer thread.
   void StopTask(FilterCallback* callback);
 
   // Carries out disabling the audio stream on the demuxer thread.
   void DisableAudioStreamTask();
 
@@ skipping 60 matching lines @@
   // store these bits for deferred reporting to the FilterHost when we get one.
   base::TimeDelta max_duration_;
   PipelineStatus deferred_status_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_DEMUXER_H_