Share one thread between all AudioOutputControllers instead of creating one per stream.

media/audio/fake_audio_input_stream_unittest.cc

 // Copyright (c) 2010 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/basictypes.h"
 #include "base/platform_thread.h"
 #include "media/audio/audio_io.h"
+#include "media/audio/audio_manager.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::_;
 using ::testing::AtLeast;
 using ::testing::Exactly;
 using ::testing::NotNull;
 
 namespace {
 
@@ skipping 23 matching lines @@
   // Ask for one recorded packet every 50ms.
   AudioInputStream* stream = audio_man->MakeAudioInputStream(
       AudioManager::AUDIO_MOCK, 2, 8000, 8, 400);
   ASSERT_TRUE(NULL != stream);
   EXPECT_TRUE(stream->Open());
   stream->Start(&callback);
   PlatformThread::Sleep(340);  // Give sufficient time to receive 5 / 6 packets.
   stream->Stop();
   stream->Close();
 }
-