CmaMediaPipelineClient to watch media pipeline status

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 <string>
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
@@ skipping 68 matching lines @@
   return scoped_ptr<::media::AudioManagerFactory>();
 }
 
 #if !defined(OS_ANDROID)
 scoped_ptr<media::MediaPipelineBackend>
 CastContentBrowserClient::CreateMediaPipelineBackend(
     const media::MediaPipelineDeviceParams& params) {
   return make_scoped_ptr(
       media::CastMediaShlib::CreateMediaPipelineBackend(params));
 }
+
+void CastContentBrowserClient::OnMediaPipelineBackendCreate() {}
+
+void CastContentBrowserClient::OnMediaPipelineBackendDestroy() {}
 #endif
 
 void CastContentBrowserClient::ProcessExiting() {
   // Finalize CastMediaShlib on media thread to ensure it's not accessed
   // after Finalize.
   media::MediaMessageLoop::GetTaskRunner()->PostTask(
       FROM_HERE, base::Bind(&media::CastMediaShlib::Finalize));
 }
 
 void CastContentBrowserClient::SetMetricsClientId(
@@ skipping 13 matching lines @@
   return parts;
 }
 
 void CastContentBrowserClient::RenderProcessWillLaunch(
     content::RenderProcessHost* host) {
 #if !defined(OS_ANDROID)
   scoped_refptr<media::CmaMessageFilterHost> cma_message_filter(
       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)
 
   // Forcibly trigger I/O-thread URLRequestContext initialization before
   // getting HostResolver.
   content::BrowserThread::PostTaskAndReplyWithResult(
       content::BrowserThread::IO, FROM_HERE,
       base::Bind(&net::URLRequestContextGetter::GetURLRequestContext,
                  base::Unretained(
@@ skipping 306 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