Moved the fake input stream's processing onto the audio worker thread.

media/audio/fake_audio_output_stream.cc

Index: media/audio/fake_audio_output_stream.cc
diff --git a/media/audio/fake_audio_output_stream.cc b/media/audio/fake_audio_output_stream.cc
index d5e0d5f551fb15cf1a696a4d25759d63ff1278be..b919b84ccf986ecb9dd4b5a7ea7b2bc8256b935e 100644
--- a/media/audio/fake_audio_output_stream.cc
+++ b/media/audio/fake_audio_output_stream.cc
@@ -22,7 +22,8 @@ FakeAudioOutputStream::FakeAudioOutputStream(AudioManagerBase* manager,
                                              const AudioParameters& params)
     : audio_manager_(manager),
       callback_(NULL),
-      fake_consumer_(manager->GetWorkerTaskRunner(), params) {
+      fake_worker_(manager->GetWorkerTaskRunner(), params),
+      audio_bus_(AudioBus::Create(params)) {
 }
 
 FakeAudioOutputStream::~FakeAudioOutputStream() {
@@ -31,19 +32,20 @@ FakeAudioOutputStream::~FakeAudioOutputStream() {
 
 bool FakeAudioOutputStream::Open() {
   DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
+  audio_bus_->Zero();
   return true;
 }
 
 void FakeAudioOutputStream::Start(AudioSourceCallback* callback)  {
   DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
   callback_ = callback;
-  fake_consumer_.Start(base::Bind(
+  fake_worker_.Start(base::Bind(
       &FakeAudioOutputStream::CallOnMoreData, base::Unretained(this)));
 }
 
 void FakeAudioOutputStream::Stop() {
   DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
-  fake_consumer_.Stop();
+  fake_worker_.Stop();
   callback_ = NULL;
 }
 
@@ -59,9 +61,9 @@ void FakeAudioOutputStream::GetVolume(double* volume) {
   *volume = 0;
 };
 
-void FakeAudioOutputStream::CallOnMoreData(AudioBus* audio_bus) {
+void FakeAudioOutputStream::CallOnMoreData() {
   DCHECK(audio_manager_->GetWorkerTaskRunner()->BelongsToCurrentThread());
-  callback_->OnMoreData(audio_bus, 0);
+  callback_->OnMoreData(audio_bus_.get(), 0);
 }
 
 }  // namespace media