Chromecast: mitigate threading issue between AvPipeline/MediaKeys.

chromecast/media/cma/pipeline/audio_pipeline_impl.cc

Index: chromecast/media/cma/pipeline/audio_pipeline_impl.cc
diff --git a/chromecast/media/cma/pipeline/audio_pipeline_impl.cc b/chromecast/media/cma/pipeline/audio_pipeline_impl.cc
index 404031faa56d06d23903106a253bf83906dbe4db..a5248884c4d00f4b9ecee0c76a6e530996a4c9f5 100644
--- a/chromecast/media/cma/pipeline/audio_pipeline_impl.cc
+++ b/chromecast/media/cma/pipeline/audio_pipeline_impl.cc
@@ -22,9 +22,9 @@ 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();
 }