[chromecast] Moves CastAudioOutputStream::Backend to CMA thread.

chromecast/media/cma/backend/media_pipeline_backend_factory_impl.cc

Index: chromecast/media/cma/backend/media_pipeline_backend_factory_impl.cc
diff --git a/chromecast/media/cma/backend/media_pipeline_backend_factory.cc b/chromecast/media/cma/backend/media_pipeline_backend_factory_impl.cc
similarity index 81%
rename from chromecast/media/cma/backend/media_pipeline_backend_factory.cc
rename to chromecast/media/cma/backend/media_pipeline_backend_factory_impl.cc
index d6df9d7e3ceb0c0fb5fc04b21efb4858aeadc204..cb32729327b058adf2f7ede4e37c55c9dc03577b 100644
--- a/chromecast/media/cma/backend/media_pipeline_backend_factory.cc
+++ b/chromecast/media/cma/backend/media_pipeline_backend_factory_impl.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chromecast/media/cma/backend/media_pipeline_backend_factory.h"
+#include "chromecast/media/cma/backend/media_pipeline_backend_factory_impl.h"
 
 #include "chromecast/media/cma/backend/media_pipeline_backend_manager.h"
 #include "chromecast/public/media/media_pipeline_backend.h"
@@ -11,16 +11,16 @@
 namespace chromecast {
 namespace media {
 
-MediaPipelineBackendFactory::MediaPipelineBackendFactory(
+MediaPipelineBackendFactoryImpl::MediaPipelineBackendFactoryImpl(
     MediaPipelineBackendManager* media_pipeline_backend_manager)
     : media_pipeline_backend_manager_(media_pipeline_backend_manager) {
   DCHECK(media_pipeline_backend_manager_);
 }
 
-MediaPipelineBackendFactory::~MediaPipelineBackendFactory() {}
+MediaPipelineBackendFactoryImpl::~MediaPipelineBackendFactoryImpl() {}
 
 std::unique_ptr<MediaPipelineBackend>
-MediaPipelineBackendFactory::CreateBackend(
+MediaPipelineBackendFactoryImpl::CreateBackend(
     const MediaPipelineDeviceParams& params) {
   return media_pipeline_backend_manager_->CreateMediaPipelineBackend(params);
 }