Revert of MSE: Relax the 'media segment must begin with keyframe' requirement

media/filters/chunk_demuxer.cc

 // Copyright (c) 2012 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/chunk_demuxer.h"
 
 #include <algorithm>
 #include <limits>
 #include <list>
 #include <utility>
@@ skipping 142 matching lines @@
 }
 
 TimeDelta ChunkDemuxerStream::GetBufferedDuration() const {
   return stream_->GetBufferedDuration();
 }
 
 size_t ChunkDemuxerStream::GetBufferedSize() const {
   return stream_->GetBufferedSize();
 }
 
-void ChunkDemuxerStream::OnStartOfCodedFrameGroup(
-    DecodeTimestamp start_timestamp) {
-  DVLOG(2) << "ChunkDemuxerStream::OnStartOfCodedFrameGroup("
+void ChunkDemuxerStream::OnNewMediaSegment(DecodeTimestamp start_timestamp) {
+  DVLOG(2) << "ChunkDemuxerStream::OnNewMediaSegment("
            << start_timestamp.InSecondsF() << ")";
   base::AutoLock auto_lock(lock_);
-  stream_->OnStartOfCodedFrameGroup(start_timestamp);
+  stream_->OnNewMediaSegment(start_timestamp);
 }
 
 bool ChunkDemuxerStream::UpdateAudioConfig(
     const AudioDecoderConfig& config,
     const scoped_refptr<MediaLog>& media_log) {
   DCHECK(config.IsValidConfig());
   DCHECK_EQ(type_, AUDIO);
   base::AutoLock auto_lock(lock_);
   if (!stream_) {
     DCHECK_EQ(state_, UNINITIALIZED);
@@ skipping 931 matching lines @@
 }
 
 void ChunkDemuxer::ShutdownAllStreams() {
   for (MediaSourceStateMap::iterator itr = source_state_map_.begin();
        itr != source_state_map_.end(); ++itr) {
     itr->second->Shutdown();
   }
 }
 
 }  // namespace media