[chromecast] Bind and run mojo media services on cma thread.

chromecast/browser/cast_content_browser_client.h

Index: chromecast/browser/cast_content_browser_client.h
diff --git a/chromecast/browser/cast_content_browser_client.h b/chromecast/browser/cast_content_browser_client.h
index 19ccffacc522ab4e15ac669d140e9b70826791ca..a4694f4eb379bd0e849056be7efd38e98da7de58 100644
--- a/chromecast/browser/cast_content_browser_client.h
+++ b/chromecast/browser/cast_content_browser_client.h
@@ -67,6 +67,9 @@ class CastContentBrowserClient : public content::ContentBrowserClient {
       media::VideoPlaneController* video_plane_controller);
 
 #if !defined(OS_ANDROID)
+  // Returns the task runner that must be used for media IO.
+  scoped_refptr<base::SingleThreadTaskRunner> GetMediaTaskRunner();
+
   // Creates a MediaPipelineDevice (CMA backend) for media playback, called
   // once per media player instance.
   virtual scoped_ptr<media::MediaPipelineBackend> CreateMediaPipelineBackend(
@@ -161,9 +164,6 @@ class CastContentBrowserClient : public content::ContentBrowserClient {
  protected:
   CastContentBrowserClient();
 
-  // Returns the task runner that must be used for media IO.
-  scoped_refptr<base::SingleThreadTaskRunner> GetMediaTaskRunner();
-
   URLRequestContextFactory* url_request_context_factory() const {
     return url_request_context_factory_.get();
   }