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

media/filters/adaptive_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 a Demuxer that can switch among different data sources mid-stream.
 // Uses FFmpegDemuxer under the covers, so see the caveats at the top of
 // ffmpeg_demuxer.h.
 
 #ifndef MEDIA_FILTERS_ADAPTIVE_DEMUXER_H_
 #define MEDIA_FILTERS_ADAPTIVE_DEMUXER_H_
@@ skipping 61 matching lines @@
   AdaptiveDemuxer(DemuxerVector const& demuxers,
                   int initial_audio_demuxer_index,
                   int initial_video_demuxer_index);
   virtual ~AdaptiveDemuxer();
 
   // Change which demuxers the streams will use.
   void ChangeCurrentDemuxer(int audio_index, int video_index);
 
   // 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);
 
  private:
   // Returns a pointer to the currently active demuxer of the given type.
@@ skipping 34 matching lines @@
 
  private:
   scoped_ptr<DemuxerFactory> delegate_factory_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(AdaptiveDemuxerFactory);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_ADAPTIVE_DEMUXER_H_