[chromecast] Pass media task runner to MediaPipelineBackendManager.

chromecast/browser/cast_content_browser_client.h

 // 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.
 
 #ifndef CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_
 #define CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 15 matching lines @@
 
 namespace metrics {
 class MetricsService;
 }
 
 namespace chromecast {
 class CastService;
 
 namespace media {
 class MediaPipelineBackend;
+class MediaPipelineBackendManager;
 struct MediaPipelineDeviceParams;
 class MediaResourceTracker;
 class VideoPlaneController;
 }
 
 namespace shell {
 
 class CastBrowserMainParts;
 class URLRequestContextFactory;
 
@@ skipping 20 matching lines @@
       net::URLRequestContextGetter* request_context_getter,
       media::VideoPlaneController* video_plane_controller);
 
 #if !defined(OS_ANDROID)
   // Creates a MediaPipelineDevice (CMA backend) for media playback, called
   // once per media player instance.
   virtual scoped_ptr<media::MediaPipelineBackend> CreateMediaPipelineBackend(
       const media::MediaPipelineDeviceParams& params);
 
   media::MediaResourceTracker* media_resource_tracker();
+
+  media::MediaPipelineBackendManager* media_pipeline_backend_manager();

[alokp, 2016/04/01 03:05:16]

where is this being used?

[tianyuwang1, 2016/04/01 17:23:19]

This is being used in cast_content_browser_client_internal.cc

 #endif
 
   // Invoked when the metrics client ID changes.
   virtual void SetMetricsClientId(const std::string& client_id);
 
   // Allows registration of extra metrics providers.
   virtual void RegisterMetricsProviders(
       ::metrics::MetricsService* metrics_service);
 
   // Returns whether or not the remote debugging service should be started
@@ skipping 106 matching lines @@
   CastBrowserMainParts* cast_browser_main_parts_;
   scoped_ptr<URLRequestContextFactory> url_request_context_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastContentBrowserClient);
 };
 
 }  // namespace shell
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_