[Chromecast] Upgrade to new CMA backend API

chromecast/browser/media/cma_media_pipeline_client.h

Index: chromecast/browser/media/cma_media_pipeline_client.h
diff --git a/chromecast/browser/media/cma_media_pipeline_client.h b/chromecast/browser/media/cma_media_pipeline_client.h
index f7ecd4b80429d2c3e3eb6aefafbb6da7fc29426e..4caa59d07c969bb4b13dcfb66fa743ca059fa5ff 100644
--- a/chromecast/browser/media/cma_media_pipeline_client.h
+++ b/chromecast/browser/media/cma_media_pipeline_client.h
@@ -14,19 +14,21 @@
 namespace chromecast {
 namespace media {
 
-// Class to provide media backend and watch media pipeline status
+struct MediaPipelineDeviceParams;
+
+// Class to provide media backend and watch media pipeline status.
 class CmaMediaPipelineClient : public base::RefCounted<CmaMediaPipelineClient>,
                                public CastResource {
  public:
   CmaMediaPipelineClient();
 
   virtual scoped_ptr<MediaPipelineBackend> CreateMediaPipelineBackend(
-      const media::MediaPipelineDeviceParams& params);
+      const MediaPipelineDeviceParams& params);
 
   virtual void OnMediaPipelineBackendCreated();
   virtual void OnMediaPipelineBackendDestroyed();
 
-  // cast::CastResource implementations
+  // cast::CastResource implementation:
   void ReleaseResource(CastResource::Resource resource) override;
 
  protected:
@@ -35,7 +37,7 @@ class CmaMediaPipelineClient : public base::RefCounted<CmaMediaPipelineClient>,
  private:
   friend class base::RefCounted<CmaMediaPipelineClient>;
 
-  // Number of created media pipelines
+  // Number of created media pipelines.
   size_t media_pipeline_count_;
   base::ThreadChecker thread_checker_;