Fire canplaythrough event at the proper time for audio/video

media/filters/chunk_demuxer.cc

 // 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.
 
 #include "media/filters/chunk_demuxer.h"
 
@@ skipping 338 matching lines @@
   cb.Run(status);
 }
 
 void ChunkDemuxer::OnAudioRendererDisabled() {
   base::AutoLock auto_lock(lock_);
   audio_ = NULL;
 }
 
 void ChunkDemuxer::SetPreload(Preload preload) {}
 
+int ChunkDemuxer::GetBitrate() {
+  // Bitrate is unknown.
+  return 0;
+}
+
 // Demuxer implementation.
 scoped_refptr<DemuxerStream> ChunkDemuxer::GetStream(
     DemuxerStream::Type type) {
   if (type == DemuxerStream::VIDEO)
     return video_;
 
   if (type == DemuxerStream::AUDIO)
     return audio_;
 
   return NULL;
@@ skipping 362 matching lines @@
     base::AutoUnlock auto_unlock(lock_);
     if (cb.is_null()) {
       host()->SetError(error);
       return;
     }
     cb.Run(error);
   }
 }
 
 }  // namespace media