Use the browser UI thread for audio on OSX.

media/audio/audio_input_controller.cc

 // Copyright (c) 2012 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 "media/audio/audio_input_controller.h"
 
 #include "base/bind.h"
 #include "base/threading/thread_restrictions.h"
 #include "media/base/limits.h"
 #include "media/base/scoped_histogram_timer.h"
@@ skipping 95 matching lines @@
           base::Bind(&AudioInputController::DoCreate, controller,
                      base::Unretained(audio_manager), params, device_id))) {
     controller = NULL;
   }
 
   return controller;
 }
 
 // static
 scoped_refptr<AudioInputController> AudioInputController::CreateForStream(
-    AudioManager* audio_manager,
+    const scoped_refptr<base::MessageLoopProxy>& message_loop,
     EventHandler* event_handler,
     AudioInputStream* stream,
     SyncWriter* sync_writer) {
-  DCHECK(audio_manager);
   DCHECK(sync_writer);
   DCHECK(stream);
 
   // Create the AudioInputController object and ensure that it runs on
   // the audio-manager thread.
   scoped_refptr<AudioInputController> controller(new AudioInputController(
       event_handler, sync_writer));
-  controller->message_loop_ = audio_manager->GetMessageLoop();
+  controller->message_loop_ = message_loop;
 
   // TODO(miu): See TODO at top of file.  Until that's resolved, we need to
   // disable the error auto-detection here (since the audio mirroring
   // implementation will reliably report error and close events).  Note, of
   // course, that we're assuming CreateForStream() has been called for the audio
   // mirroring use case only.
   if (!controller->message_loop_->PostTask(
           FROM_HERE,
           base::Bind(&AudioInputController::DoCreateForStream, controller,
                      stream, false))) {
@@ skipping 233 matching lines @@
 
 void AudioInputController::SetDataIsActive(bool enabled) {
   base::subtle::Release_Store(&data_is_active_, enabled);
 }
 
 bool AudioInputController::GetDataIsActive() {
   return (base::subtle::Acquire_Load(&data_is_active_) != false);
 }
 
 }  // namespace media