CmaMediaPipelineClient to watch media pipeline status

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 1dc6b81154811202d0be04f11adc6d3385b31ddf..894be2d66ac68ad742f8bf9a58a79e48405581a1 100644
--- a/chromecast/browser/cast_content_browser_client.cc
+++ b/chromecast/browser/cast_content_browser_client.cc
@@ -86,6 +86,10 @@ CastContentBrowserClient::CreateMediaPipelineBackend(
   return make_scoped_ptr(
       media::CastMediaShlib::CreateMediaPipelineBackend(params));
 }
+
+void CastContentBrowserClient::OnMediaPipelineBackendCreate() {}
+
+void CastContentBrowserClient::OnMediaPipelineBackendDestroy() {}
 #endif
 
 void CastContentBrowserClient::ProcessExiting() {
@@ -119,6 +123,10 @@ void CastContentBrowserClient::RenderProcessWillLaunch(
       new media::CmaMessageFilterHost(
           host->GetID(),
           base::Bind(&CastContentBrowserClient::CreateMediaPipelineBackend,
+                     base::Unretained(this)),
+          base::Bind(&CastContentBrowserClient::OnMediaPipelineBackendCreate,
+                     base::Unretained(this)),
+          base::Bind(&CastContentBrowserClient::OnMediaPipelineBackendDestroy,
                      base::Unretained(this))));
   host->AddFilter(cma_message_filter.get());
 #endif  // !defined(OS_ANDROID)