Ensures that audio tasks cannot run after AudioManager is deleted.

content/browser/renderer_host/media/audio_output_authorization_handler_unittest.cc

 // Copyright 2016 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.
 
 // Unit tests for AudioOutputAuthorizationHandler.
 
 #include "content/browser/renderer_host/media/audio_output_authorization_handler.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 56 matching lines @@
     audio_manager_.reset(new media::FakeAudioManager(
         audio_thread_->task_runner(), audio_thread_->worker_task_runner(),
         &log_factory_));
     audio_system_ = media::AudioSystemImpl::Create(audio_manager_.get());
     media_stream_manager_ =
         base::MakeUnique<MediaStreamManager>(audio_system_.get());
     // Make sure everything is done initializing:
     SyncWithAllThreads();
   }
 
-  ~AudioOutputAuthorizationHandlerTest() override { SyncWithAllThreads(); }
+  ~AudioOutputAuthorizationHandlerTest() override {
+    audio_manager_->GetTaskRunner()->PostTask(
+        FROM_HERE, base::Bind(&media::AudioManager::Shutdown,
+                              base::Unretained(audio_manager_.get())));
+    SyncWithAllThreads();
+  }
 
  protected:
   MediaStreamManager* GetMediaStreamManager() {
     return media_stream_manager_.get();
   }
 
   media::AudioSystem* GetAudioSystem() { return audio_system_.get(); }
 
   void SyncWithAllThreads() {
     // New tasks might be posted while we are syncing, but in
@@ skipping 44 matching lines @@
               *out = result[MediaDeviceType::MEDIA_DEVICE_TYPE_AUDIO_OUTPUT][1]
                          .device_id;
             },
             base::Unretained(out)));
   }
 
   // media_stream_manager must die after threads since it's a
   // DestructionObserver.
   std::unique_ptr<MediaStreamManager> media_stream_manager_;
   std::unique_ptr<TestBrowserThreadBundle> thread_bundle_;
+  media::FakeAudioLogFactory log_factory_;
+  std::unique_ptr<media::AudioManager> audio_manager_;
+  std::unique_ptr<media::AudioSystem> audio_system_;
   std::unique_ptr<AudioManagerThread> audio_thread_;
-  media::FakeAudioLogFactory log_factory_;
-  media::ScopedAudioManagerPtr audio_manager_;
-  std::unique_ptr<media::AudioSystem> audio_system_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioOutputAuthorizationHandlerTest);
 };
 
 TEST_F(AudioOutputAuthorizationHandlerTest, AuthorizeDefaultDevice_Ok) {
   MockAuthorizationCallback listener;
   EXPECT_CALL(listener,
               Run(media::OUTPUT_DEVICE_STATUS_OK, false, _, kDefaultDeviceId))
       .Times(1);
   std::unique_ptr<AudioOutputAuthorizationHandler> handler =
@@ skipping 172 matching lines @@
       (base::Bind(&AudioOutputAuthorizationHandler::RequestDeviceAuthorization,
                   base::Unretained(handler.get()), kRenderFrameId, kSessionId,
                   std::string(), BadSecurityOrigin(), listener.Get())));
 
   SyncWithAllThreads();
   BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE, handler.release());
   SyncWithAllThreads();
 }
 
 }  // namespace content