[chromecast] Pass media task runner to MediaPipelineBackendManager.

chromecast/browser/cast_browser_main_parts.cc

Index: chromecast/browser/cast_browser_main_parts.cc
diff --git a/chromecast/browser/cast_browser_main_parts.cc b/chromecast/browser/cast_browser_main_parts.cc
index 5c3862b65cf2f3a976493bde29710310364e40b9..001d54cf2d50f1eab9fe3083ae489b6d70f43adc 100644
--- a/chromecast/browser/cast_browser_main_parts.cc
+++ b/chromecast/browser/cast_browser_main_parts.cc
@@ -273,6 +273,15 @@ media::MediaResourceTracker* CastBrowserMainParts::media_resource_tracker() {
 }
 #endif
 
+media::MediaPipelineBackendManager*
+CastBrowserMainParts::media_pipeline_backend_manager() {
+  if (!media_pipeline_backend_manager_) {
+    media_pipeline_backend_manager_.reset(
+        new media::MediaPipelineBackendManager(GetMediaTaskRunner()));
+  }
+  return media_pipeline_backend_manager_.get();
+}
+
 void CastBrowserMainParts::PreMainMessageLoopStart() {
   // GroupedHistograms needs to be initialized before any threads are created
   // to prevent race conditions between calls to Preregister and those threads
@@ -337,7 +346,8 @@ int CastBrowserMainParts::PreCreateThreads() {
 
   // AudioManager is created immediately after threads are created, requiring
   // AudioManagerFactory to be set beforehand.
-  ::media::AudioManager::SetFactory(new media::CastAudioManagerFactory());
+  ::media::AudioManager::SetFactory(
+      new media::CastAudioManagerFactory(media_pipeline_backend_manager()));
 
   // Set GL strings so GPU config code can make correct feature blacklisting/
   // whitelisting decisions.
@@ -416,7 +426,7 @@ void CastBrowserMainParts::PreMainMessageLoopRun() {
           cast_browser_process_->browser_context(),
           cast_browser_process_->pref_service(),
           url_request_context_factory_->GetSystemGetter(),
-          video_plane_controller_.get()));
+          video_plane_controller_.get(), media_pipeline_backend_manager()));
   cast_browser_process_->cast_service()->Initialize();
 
 #if !defined(OS_ANDROID)
@@ -485,6 +495,7 @@ void CastBrowserMainParts::PostDestroyThreads() {
 #if !defined(OS_ANDROID)
   media_resource_tracker_->FinalizeAndDestroy();
   media_resource_tracker_ = nullptr;
+  media_pipeline_backend_manager_.reset(nullptr);

[alokp, 2016/03/31 04:37:24]

1. No need for nullptr.
2. This needs to happen before we finalize the media shlib.
3. We should probably move media shlib initialize/finalize from
MediaResourceTracker to MediaPipelineBackendManager. This can be done in a
separate patch.

[tianyuwang1, 2016/03/31 18:14:53]

Done.

 #endif
 }