Get audio_unittests passing with h/w on windows.

media/audio/audio_manager_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/environment.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/waitable_event.h"
 #include "media/audio/audio_manager.h"
@@ skipping 15 matching lines @@
 #if defined(USE_PULSEAUDIO)
 #include "media/audio/pulse/audio_manager_pulse.h"
 #endif  // defined(USE_PULSEAUDIO)
 
 namespace media {
 
 // Test fixture which allows us to override the default enumeration API on
 // Windows.
 class AudioManagerTest : public ::testing::Test {
  protected:
-  AudioManagerTest()
-      : audio_manager_(AudioManager::CreateForTesting())
-#if defined(OS_WIN)
-      , com_init_(base::win::ScopedCOMInitializer::kMTA)
-#endif
-  {
+  AudioManagerTest() : audio_manager_(AudioManager::CreateForTesting()) {
     // Wait for audio thread initialization to complete.  Otherwise the
     // enumeration type may not have been set yet.
     base::WaitableEvent event(false, false);
     audio_manager_->GetTaskRunner()->PostTask(FROM_HERE, base::Bind(
         &base::WaitableEvent::Signal, base::Unretained(&event)));
     event.Wait();
   }
 
 #if defined(OS_WIN)
   bool SetMMDeviceEnumeration() {
@@ skipping 96 matching lines @@
 
   void RunOnAudioThreadImpl(const base::Closure& closure,
                             base::WaitableEvent* event) {
     DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
     closure.Run();
     event->Signal();
   }
 
   FakeAudioLogFactory fake_audio_log_factory_;
   scoped_ptr<AudioManager> audio_manager_;
-
-#if defined(OS_WIN)
-  // The MMDevice API requires COM to be initialized on the current thread.
-  base::win::ScopedCOMInitializer com_init_;
-#endif
 };
 
 // Test that devices can be enumerated.
 TEST_F(AudioManagerTest, EnumerateInputDevices) {
   ABORT_AUDIO_TEST_IF_NOT(InputDevicesAvailable());
 
   AudioDeviceNames device_names;
   RunOnAudioThread(
       base::Bind(&AudioManager::GetAudioInputDeviceNames,
                  base::Unretained(audio_manager_.get()),
@@ skipping 198 matching lines @@
       DVLOG(2) << it->unique_id << " matches with " << output_device_id;
       found_an_associated_device = true;
     }
   }
 
   EXPECT_TRUE(found_an_associated_device);
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 }
 
 }  // namespace media