Add audio_device_id in mojo media ServiceFactory CreateRenderer api.

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 321755c43dc6727b2578b078f6be6c66ae1711be..83bf8d352b2b6bb2a9584e4faa62c225a1a0c90b 100644
--- a/chromecast/browser/cast_content_browser_client.cc
+++ b/chromecast/browser/cast_content_browser_client.cc
@@ -154,8 +154,10 @@ CastContentBrowserClient::GetMediaTaskRunner() {
 
 std::unique_ptr<media::MediaPipelineBackend>
 CastContentBrowserClient::CreateMediaPipelineBackend(
-    const media::MediaPipelineDeviceParams& params) {
-  return media_pipeline_backend_manager()->CreateMediaPipelineBackend(params);
+    const media::MediaPipelineDeviceParams& params,
+    const std::string& audio_device_id) {
+  return media_pipeline_backend_manager()->CreateMediaPipelineBackend(
+      params, audio_device_id);

[kmackay, 2016/07/12 16:22:08]

Don't pass the audio_device_id to
media_pipeline_backend_manager()->CreateMediaPipelineBackend() here (just pass
params).

[tianyuwang1, 2016/07/12 16:26:35]

Oops.  Done.

 }
 
 media::MediaResourceTracker*