Ensures that audio tasks cannot run after AudioManager is deleted.

content/browser/renderer_host/media/audio_output_delegate_impl_unittest.cc

Index: content/browser/renderer_host/media/audio_output_delegate_impl_unittest.cc
diff --git a/content/browser/renderer_host/media/audio_output_delegate_impl_unittest.cc b/content/browser/renderer_host/media/audio_output_delegate_impl_unittest.cc
index 65f8bea3c720640f5e86086e16769518c2cee14f..74822a9ec7597294bf11815fd25da3966ac1f0aa 100644
--- a/content/browser/renderer_host/media/audio_output_delegate_impl_unittest.cc
+++ b/content/browser/renderer_host/media/audio_output_delegate_impl_unittest.cc
@@ -15,12 +15,12 @@
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/sync_socket.h"
-#include "content/browser/audio_manager_thread.h"
 #include "content/browser/media/capture/audio_mirroring_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/media_observer.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "media/audio/audio_output_controller.h"
+#include "media/audio/audio_thread_impl.h"
 #include "media/audio/fake_audio_log_factory.h"
 #include "media/audio/fake_audio_manager.h"
 #include "media/base/media_switches.h"
@@ -110,12 +110,11 @@ class AudioOutputDelegateTest : public testing::Test {
     // approximate the real conditions of AudioOutputDelegate well.
     thread_bundle_ = base::MakeUnique<TestBrowserThreadBundle>(
         TestBrowserThreadBundle::Options::REAL_IO_THREAD);
-    audio_thread_ = base::MakeUnique<AudioManagerThread>();
 
     audio_manager_.reset(new media::FakeAudioManager(
-        audio_thread_->task_runner(), audio_thread_->worker_task_runner(),
-        &log_factory_));
+        base::MakeUnique<media::AudioThreadImpl>(), &log_factory_));
   }
+  ~AudioOutputDelegateTest() { audio_manager_->Shutdown(); }
 
   // Test bodies are here, so that we can run them on the IO thread.
   void CreateTest(base::Closure done) {
@@ -432,8 +431,7 @@ class AudioOutputDelegateTest : public testing::Test {
 
  protected:
   std::unique_ptr<TestBrowserThreadBundle> thread_bundle_;
-  std::unique_ptr<AudioManagerThread> audio_thread_;
-  media::ScopedAudioManagerPtr audio_manager_;
+  std::unique_ptr<media::AudioManager> audio_manager_;
   StrictMock<MockAudioMirroringManager> mirroring_manager_;
   StrictMock<MockEventHandler> event_handler_;
   StrictMock<MockObserver> media_observer_;