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

chromecast/browser/cast_content_browser_client.cc

Index: chromecast/browser/cast_content_browser_client.cc
diff --git a/chromecast/browser/cast_content_browser_client.cc b/chromecast/browser/cast_content_browser_client.cc
index dc5902ac7e67d80b42745ebef9874ac48bb4bbe7..d5e779d3774377dfe8798e1668c521b0bd1dd994 100644
--- a/chromecast/browser/cast_content_browser_client.cc
+++ b/chromecast/browser/cast_content_browser_client.cc
@@ -71,6 +71,7 @@ static scoped_ptr<mojo::ShellClient> CreateCastMojoMediaApplication(
     CastContentBrowserClient* browser_client) {
   scoped_ptr<::media::MojoMediaClient> mojo_media_client(
       new media::CastMojoMediaClient(
+          browser_client->GetMediaTaskRunner(),
           base::Bind(&CastContentBrowserClient::CreateMediaPipelineBackend,
                      base::Unretained(browser_client))));
   return scoped_ptr<mojo::ShellClient>(
@@ -106,6 +107,12 @@ scoped_ptr<CastService> CastContentBrowserClient::CreateCastService(
 }
 
 #if !defined(OS_ANDROID)
+scoped_refptr<base::SingleThreadTaskRunner>
+CastContentBrowserClient::GetMediaTaskRunner() {
+  DCHECK(cast_browser_main_parts_);
+  return cast_browser_main_parts_->GetMediaTaskRunner();
+}
+
 scoped_ptr<media::MediaPipelineBackend>
 CastContentBrowserClient::CreateMediaPipelineBackend(
     const media::MediaPipelineDeviceParams& params) {
@@ -163,12 +170,6 @@ void CastContentBrowserClient::RenderProcessWillLaunch(
                  base::Unretained(this), host->GetID()));
 }
 
-scoped_refptr<base::SingleThreadTaskRunner>
-CastContentBrowserClient::GetMediaTaskRunner() {
-  DCHECK(cast_browser_main_parts_);
-  return cast_browser_main_parts_->GetMediaTaskRunner();
-}
-
 void CastContentBrowserClient::AddNetworkHintsMessageFilter(
     int render_process_id, net::URLRequestContext* context) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);