Ensures that audio tasks cannot run after AudioManager is deleted.

media/cast/test/receiver.cc

 // Copyright 2013 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 <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 #include <climits>
@@ skipping 543 matching lines @@
 int main(int argc, char** argv) {
   base::AtExitManager at_exit;
   base::CommandLine::Init(argc, argv);
   InitLogging(logging::LoggingSettings());
   base::MessageLoop message_loop;
 
   scoped_refptr<media::cast::CastEnvironment> cast_environment(
       new media::cast::StandaloneCastEnvironment);
 
   // Start up Chromium audio system.
-  const media::ScopedAudioManagerPtr audio_manager(
-      media::AudioManager::CreateForTesting(
-          base::ThreadTaskRunnerHandle::Get()));
+  auto audio_manager = media::AudioManager::CreateForTesting(
+      base::ThreadTaskRunnerHandle::Get());
   CHECK(media::AudioManager::Get());
 
   media::cast::FrameReceiverConfig audio_config =
       media::cast::GetAudioReceiverConfig();
   media::cast::FrameReceiverConfig video_config =
       media::cast::GetVideoReceiverConfig();
 
   // Determine local and remote endpoints.
   uint16_t remote_port, local_port;
   media::cast::GetPorts(&remote_port, &local_port);
@@ skipping 28 matching lines @@
                                   audio_config,
                                   video_config,
                                   window_width,
                                   window_height);
   player.Start();
 
   base::RunLoop().Run();  // Run forever (i.e., until SIGTERM).
   NOTREACHED();
   return 0;
 }