Ensures that audio tasks cannot run after AudioManager is deleted.

media/audio/sounds/audio_stream_handler_unittest.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 "media/audio/sounds/audio_stream_handler.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 22 matching lines @@
     audio_manager_ =
         AudioManager::CreateForTesting(base::ThreadTaskRunnerHandle::Get());
     base::RunLoop().RunUntilIdle();
 
     base::StringPiece data(kTestAudioData, arraysize(kTestAudioData));
     audio_stream_handler_.reset(new AudioStreamHandler(data));
   }
 
   void TearDown() override {
     audio_stream_handler_.reset();
+    audio_manager_->Shutdown();
     base::RunLoop().RunUntilIdle();
   }
 
   AudioStreamHandler* audio_stream_handler() {
     return audio_stream_handler_.get();
   }
 
   void SetObserverForTesting(AudioStreamHandler::TestObserver* observer) {
     AudioStreamHandler::SetObserverForTesting(observer);
   }
 
   void SetAudioSourceForTesting(
       AudioOutputStream::AudioSourceCallback* source) {
     AudioStreamHandler::SetAudioSourceForTesting(source);
   }
 
  private:
   base::TestMessageLoop message_loop_;
-  ScopedAudioManagerPtr audio_manager_;
+  std::unique_ptr<AudioManager> audio_manager_;
   std::unique_ptr<AudioStreamHandler> audio_stream_handler_;
 };
 
 TEST_F(AudioStreamHandlerTest, Play) {
   base::RunLoop run_loop;
   TestObserver observer(run_loop.QuitClosure());
 
   SetObserverForTesting(&observer);
 
   ASSERT_TRUE(audio_stream_handler()->IsInitialized());
@@ skipping 48 matching lines @@
   AudioStreamHandler handler("RIFF1234WAVEjunkjunkjunkjunk");
   EXPECT_FALSE(handler.IsInitialized());
   EXPECT_FALSE(handler.Play());
   EXPECT_EQ(base::TimeDelta(), handler.duration());
 
   // Call Stop() to ensure that there is no crash.
   handler.Stop();
 }
 
 }  // namespace media