Fire canplaythrough event at the proper time for audio/video

media/filters/dummy_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.
 
 #include "media/filters/dummy_demuxer.h"
 
 #include "base/logging.h"
 
 namespace media {
 
@@ skipping 25 matching lines @@
         new DummyDemuxerStream(DemuxerStream::AUDIO);
   if (has_video)
     streams_[DemuxerStream::VIDEO] =
         new DummyDemuxerStream(DemuxerStream::VIDEO);
 }
 
 DummyDemuxer::~DummyDemuxer() {}
 
 void DummyDemuxer::SetPreload(Preload preload) {}
 
+int DummyDemuxer::GetBitrate() {
+  // Bitrate is unknown.
+  return 0;
+}
+
 scoped_refptr<DemuxerStream> DummyDemuxer::GetStream(DemuxerStream::Type type) {
   return streams_[type];
 }
 
 base::TimeDelta DummyDemuxer::GetStartTime() const {
   return base::TimeDelta();
 }
 
 }  // namespace media