[chromecast] Pass media task runner to MediaPipelineBackendManager.

chromecast/browser/cast_content_browser_client.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromecast/browser/cast_content_browser_client.h"
 
 #include <stddef.h>
 #include <string>
 #include <utility>
 
@@ skipping 83 matching lines @@
     base::CommandLine* command_line) {
 }
 
 void CastContentBrowserClient::PreCreateThreads() {
 }
 
 scoped_ptr<CastService> CastContentBrowserClient::CreateCastService(
     content::BrowserContext* browser_context,
     PrefService* pref_service,
     net::URLRequestContextGetter* request_context_getter,
-    media::VideoPlaneController* video_plane_controller) {
+    media::VideoPlaneController* video_plane_controller,
+    media::MediaPipelineBackendManager* media_pipeline_backend_manager) {
   return make_scoped_ptr(new CastServiceSimple(browser_context, pref_service));
 }
 
 #if !defined(OS_ANDROID)
 scoped_ptr<media::MediaPipelineBackend>
 CastContentBrowserClient::CreateMediaPipelineBackend(
     const media::MediaPipelineDeviceParams& params) {
+  DCHECK(cast_browser_main_parts_);
   return make_scoped_ptr(
-      media::MediaPipelineBackendManager::CreateMediaPipelineBackend(params));
+      cast_browser_main_parts_->media_pipeline_backend_manager()
+          ->CreateMediaPipelineBackend(params));
 }
 
 media::MediaResourceTracker*
 CastContentBrowserClient::media_resource_tracker() {
   return cast_browser_main_parts_->media_resource_tracker();
 }
 #endif  // OS_ANDROID
 
 void CastContentBrowserClient::SetMetricsClientId(
     const std::string& client_id) {
@@ skipping 367 matching lines @@
         process_type, dumps_path, false /* upload */);
   // StartUploaderThread() even though upload is diferred.
   // Breakpad-related memory is freed in the uploader thread.
   crash_handler->StartUploaderThread();
   return crash_handler;
 }
 #endif  // !defined(OS_ANDROID)
 
 }  // namespace shell
 }  // namespace chromecast