Ensures that audio tasks cannot run after AudioManager is deleted.

media/audio/win/audio_low_latency_input_win_unittest.cc

 // Copyright (c) 2012 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 "media/audio/win/audio_low_latency_input_win.h"
 
 #include <mmsystem.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <windows.h>
@@ skipping 251 matching lines @@
         AudioManager::CreateForTesting(message_loop_.task_runner());
     base::RunLoop().RunUntilIdle();
   }
   ~WinAudioInputTest() override {
     audio_manager_.reset();
     base::RunLoop().RunUntilIdle();
   }
 
  protected:
   base::MessageLoop message_loop_;
-  ScopedAudioManagerPtr audio_manager_;
+  std::unique_ptr<AudioManager> audio_manager_;
 };
 
 // Verify that we can retrieve the current hardware/mixing sample rate
 // for all available input devices.
 TEST_F(WinAudioInputTest, WASAPIAudioInputStreamHardwareSampleRate) {
   ABORT_AUDIO_TEST_IF_NOT(HasCoreAudioAndInputDevices(audio_manager_.get()));
 
   // Retrieve a list of all available input devices.
   media::AudioDeviceDescriptions device_descriptions;
   audio_manager_->GetAudioInputDeviceDescriptions(&device_descriptions);
@@ skipping 268 matching lines @@
     ais->Start(&file_sink);
     base::PlatformThread::Sleep(TestTimeouts::action_timeout());
     // base::PlatformThread::Sleep(base::TimeDelta::FromMinutes(10));
     ais->Stop();
     VLOG(0) << ">> Recording has stopped.";
     ais.Close();
   }
 }
 
 }  // namespace media