Switch to STA mode for audio thread and WASAPI I/O streams.

media/audio/audio_input_volume_unittest.cc

Index: media/audio/audio_input_volume_unittest.cc
diff --git a/media/audio/audio_input_volume_unittest.cc b/media/audio/audio_input_volume_unittest.cc
index d6ee313bc250a6ede92bc0b95f90598aa3386061..1770bd66ad741a790ae1a8d0ba0c1b8a6c92e32a 100644
--- a/media/audio/audio_input_volume_unittest.cc
+++ b/media/audio/audio_input_volume_unittest.cc
@@ -4,8 +4,10 @@
 
 #include <cmath>
 
+#include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/synchronization/waitable_event.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_manager_base.h"
 #include "media/audio/audio_unittest_util.h"
@@ -38,13 +40,7 @@ double GetVolumeAfterSetVolumeOnLinux(AudioInputStream* ais,
 
 class AudioInputVolumeTest : public ::testing::Test {
  protected:
-  AudioInputVolumeTest()
-      : audio_manager_(AudioManager::CreateForTesting())
-#if defined(OS_WIN)
-       , com_init_(base::win::ScopedCOMInitializer::kMTA)
-#endif
-  {
-  }
+  AudioInputVolumeTest() : audio_manager_(AudioManager::CreateForTesting()) {}
 
   bool HasCoreAudioAndInputDevices() {
 #if defined(OS_WIN)
@@ -70,27 +66,27 @@ class AudioInputVolumeTest : public ::testing::Test {
         params, device_id);
     EXPECT_TRUE(NULL != ais);
 
-#if defined(OS_LINUX) || defined(OS_OPENBSD)
-    // Some linux devices do not support our settings, we may fail to open
-    // those devices.
+#if defined(OS_MACOSX)
+    EXPECT_TRUE(ais->Open());
+#else
+    // Some linux devices do not support our settings and some Windows devices
+    // may be "currently unavailable", we may fail to open those devices.
     if (!ais->Open()) {
       // Default device should always be able to be opened.
       EXPECT_TRUE(AudioManagerBase::kDefaultDeviceId != device_id);
       ais->Close();
       ais = NULL;
     }
-#elif defined(OS_WIN) || defined(OS_MACOSX)
-    EXPECT_TRUE(ais->Open());
 #endif
 
     return ais;
   }
 
-  scoped_ptr<AudioManager> audio_manager_;
-
 #if defined(OS_WIN)
   base::win::ScopedCOMInitializer com_init_;
 #endif
+
+  scoped_ptr<AudioManager> audio_manager_;
 };
 
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)