Ensures that audio tasks cannot run after AudioManager is deleted.

content/browser/renderer_host/media/media_devices_dispatcher_host_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.
 
 #include "content/browser/renderer_host/media/media_devices_dispatcher_host.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <queue>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/browser/renderer_host/media/media_stream_ui_proxy.h"
 #include "content/browser/renderer_host/media/video_capture_manager.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/media_device_id.h"
 #include "content/public/test/test_browser_context.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "media/audio/audio_device_description.h"
 #include "media/audio/audio_system_impl.h"
 #include "media/audio/mock_audio_manager.h"
+#include "media/audio/test_audio_thread.h"
 #include "media/base/media_switches.h"
 #include "media/capture/video/fake_video_capture_device_factory.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/origin.h"
 
 using testing::_;
 using testing::SaveArg;
 using testing::InvokeWithoutArgs;
@@ skipping 34 matching lines @@
 class MediaDevicesDispatcherHostTest : public testing::Test {
  public:
   MediaDevicesDispatcherHostTest()
       : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP),
         origin_(GURL("https://test.com")) {
     // Make sure we use fake devices to avoid long delays.
     base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
         switches::kUseFakeDeviceForMediaStream,
         base::StringPrintf("device-count=%zu, video-input-default-id=%s",
                            kNumFakeVideoDevices, kDefaultVideoDeviceID));
-    audio_manager_.reset(
-        new media::MockAudioManager(base::ThreadTaskRunnerHandle::Get()));
+    audio_manager_.reset(new media::MockAudioManager(
+        base::MakeUnique<media::TestAudioThread>()));
     audio_system_ = media::AudioSystemImpl::Create(audio_manager_.get());
     media_stream_manager_ =
         base::MakeUnique<MediaStreamManager>(audio_system_.get());
 
     host_ = base::MakeUnique<MediaDevicesDispatcherHost>(
         kProcessId, kRenderId, browser_context_.GetMediaDeviceIDSalt(),
         media_stream_manager_.get());
   }
+  ~MediaDevicesDispatcherHostTest() override { audio_manager_->Shutdown(); }
 
   void SetUp() override {
     base::RunLoop run_loop;
     MediaDevicesManager::BoolDeviceTypes devices_to_enumerate;
     devices_to_enumerate[MEDIA_DEVICE_TYPE_AUDIO_INPUT] = true;
     devices_to_enumerate[MEDIA_DEVICE_TYPE_VIDEO_INPUT] = true;
     devices_to_enumerate[MEDIA_DEVICE_TYPE_AUDIO_OUTPUT] = true;
     media_stream_manager_->media_devices_manager()->EnumerateDevices(
         devices_to_enumerate,
         base::Bind(&PhysicalDevicesEnumerated, run_loop.QuitClosure(),
@@ skipping 187 matching lines @@
   }
 
   // The order of these members is important on teardown:
   // MediaDevicesDispatcherHost expects to be destroyed on the IO thread while
   // MediaStreamManager expects to be destroyed after the IO thread has been
   // uninitialized.
   std::unique_ptr<MediaStreamManager> media_stream_manager_;
   content::TestBrowserThreadBundle thread_bundle_;
   std::unique_ptr<MediaDevicesDispatcherHost> host_;
 
-  std::unique_ptr<media::AudioManager, media::AudioManagerDeleter>
-      audio_manager_;
+  std::unique_ptr<media::AudioManager> audio_manager_;
   std::unique_ptr<media::AudioSystem> audio_system_;
   content::TestBrowserContext browser_context_;
   MediaDeviceEnumeration physical_devices_;
   url::Origin origin_;
 
   std::vector<MediaDeviceInfoArray> enumerated_devices_;
 };
 
 TEST_F(MediaDevicesDispatcherHostTest, EnumerateAudioInputDevices) {
   EnumerateDevicesAndWaitForResult(true, false, false);
@@ skipping 79 matching lines @@
   EXPECT_CALL(*this, MockVideoInputCapabilitiesCallback())
       .WillOnce(InvokeWithoutArgs([&run_loop]() { run_loop.Quit(); }));
   host_->GetVideoInputCapabilities(
       url::Origin(), base::Bind(&MediaDevicesDispatcherHostTest::
                                     VideoInputCapabilitiesUniqueOriginCallback,
                                 base::Unretained(this)));
   run_loop.Run();
 }
 
 };  // namespace content