Pass task runners to AudioManager constructor.

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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_manager.h"
 #include "media/audio/simple_sources.h"
 #include "media/audio/sounds/audio_stream_handler.h"
 #include "media/audio/sounds/test_data.h"
 #include "media/base/channel_layout.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 class AudioStreamHandlerTest : public testing::Test {
  public:
   AudioStreamHandlerTest() {}
   ~AudioStreamHandlerTest() override {}
 
   void SetUp() override {
-    audio_manager_.reset(AudioManager::CreateForTesting());
+    audio_manager_ =
+        AudioManager::CreateForTesting(message_loop_.task_runner());
 
     base::StringPiece data(kTestAudioData, arraysize(kTestAudioData));
     audio_stream_handler_.reset(new AudioStreamHandler(data));
   }
 
   void TearDown() override {
     audio_stream_handler_.reset();
+    // AudioStreamHandler destructor posts stop and delete task to audio thread.
+    // Flush audio thread to ensure that those tasks are run before attempting
+    // to destroy AudioManager.
+    base::RunLoop().RunUntilIdle();
+
     audio_manager_.reset();
   }
 
   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:
-  scoped_ptr<AudioManager> audio_manager_;
+  ScopedAudioManagerPtr audio_manager_;
   scoped_ptr<AudioStreamHandler> audio_stream_handler_;
 
   base::MessageLoop message_loop_;
 };
 
 TEST_F(AudioStreamHandlerTest, Play) {
   base::RunLoop run_loop;
   TestObserver observer(run_loop.QuitClosure());
 
   SetObserverForTesting(&observer);
@@ skipping 52 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