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

media/audio/audio_manager_base.cc

Index: media/audio/audio_manager_base.cc
diff --git a/media/audio/audio_manager_base.cc b/media/audio/audio_manager_base.cc
index edaabf4c22771e71ef38a1fba14f4969e587141e..24e0883fd1c8f8e8d9d4785e9f9fbf5d0b7c1686 100644
--- a/media/audio/audio_manager_base.cc
+++ b/media/audio/audio_manager_base.cc
@@ -83,7 +83,10 @@ AudioManagerBase::AudioManagerBase(AudioLogFactory* audio_log_factory)
       audio_thread_("AudioThread"),
       audio_log_factory_(audio_log_factory) {
 #if defined(OS_WIN)
-  audio_thread_.init_com_with_mta(true);
+  // Do not use MTA mode initalization as it causes hangs for a significant

[henrika (OOO until Aug 14), 2015/04/17 09:17:03]

are we certain that is does?

[DaleCurtis, 2015/04/17 17:58:55]

If it doesn't I'll be reverting this CL :)

+  // population of users and is not supported on Windows 8 for audio capture
+  // and rendering.  See http://crbug.com/422522.
+  audio_thread_.init_com_with_mta(false);
 #elif defined(OS_MACOSX)
   // CoreAudio calls must occur on the main thread of the process, which in our
   // case is sadly the browser UI thread.  Failure to execute calls on the right