Chromecast: mitigate threading issue between AvPipeline/MediaKeys.

chromecast/media/cma/pipeline/audio_pipeline_impl.cc

 // Copyright 2014 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 "chromecast/media/cma/pipeline/audio_pipeline_impl.h"
 
 #include "base/bind.h"
 #include "chromecast/media/cma/backend/audio_pipeline_device.h"
 #include "chromecast/media/cma/base/buffering_defs.h"
 #include "chromecast/media/cma/base/cma_logging.h"
 #include "chromecast/media/cma/base/coded_frame_provider.h"
 #include "chromecast/media/cma/pipeline/av_pipeline_impl.h"
 #include "media/base/audio_decoder_config.h"
 
 namespace chromecast {
 namespace media {
 
 namespace {
 const size_t kMaxAudioFrameSize = 32 * 1024;
 }
 
 AudioPipelineImpl::AudioPipelineImpl(AudioPipelineDevice* audio_device)
     : audio_device_(audio_device),
       weak_factory_(this) {
-  av_pipeline_impl_.reset(new AvPipelineImpl(
+  av_pipeline_impl_ = new AvPipelineImpl(
       audio_device_,
-      base::Bind(&AudioPipelineImpl::OnUpdateConfig, base::Unretained(this))));
+      base::Bind(&AudioPipelineImpl::OnUpdateConfig, base::Unretained(this)));
   weak_this_ = weak_factory_.GetWeakPtr();
 }
 
 AudioPipelineImpl::~AudioPipelineImpl() {
 }
 
 void AudioPipelineImpl::SetCodedFrameProvider(
     scoped_ptr<CodedFrameProvider> frame_provider) {
   av_pipeline_impl_->SetCodedFrameProvider(
       frame_provider.Pass(), kAppAudioBufferSize, kMaxAudioFrameSize);
@@ skipping 110 matching lines @@
   delta_stats.audio_bytes_decoded =
       current_stats.audio_bytes_decoded - previous_stats_.audio_bytes_decoded;
 
   previous_stats_ = current_stats;
 
   audio_client_.statistics_cb.Run(delta_stats);
 }
 
 }  // namespace media
 }  // namespace chromecast