Use the browser UI thread for audio on OSX.

content/test/webrtc_audio_device_test.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 "content/test/webrtc_audio_device_test.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
@@ skipping 162 matching lines @@
   // whole thing to be torn down before we finally uninitialize the io thread.
   WaitForAudioManagerCompletion();
 
   ChildProcess::current()->io_message_loop()->PostTask(FROM_HERE,
       base::Bind(&WebRTCAudioDeviceTest::UninitializeIOThread,
                  base::Unretained((this))));
   WaitForIOThreadCompletion();
   mock_process_.reset();
   media_stream_manager_.reset();
   mirroring_manager_.reset();
-  audio_manager_.reset();
   RendererWebKitPlatformSupportImpl::SetSandboxEnabledForTesting(
       sandbox_was_enabled_);
 }
 
 bool WebRTCAudioDeviceTest::Send(IPC::Message* message) {
   return channel_->Send(message);
 }
 
 void WebRTCAudioDeviceTest::SetAudioHardwareConfig(
     media::AudioHardwareConfig* hardware_config) {
@@ skipping 31 matching lines @@
 }
 
 void WebRTCAudioDeviceTest::UninitializeIOThread() {
   resource_context_.reset();
 
   test_request_context_.reset();
 
 #if defined(OS_WIN)
   initialize_com_.reset();
 #endif
+
+  audio_manager_.reset();
 }
 
 void WebRTCAudioDeviceTest::CreateChannel(const char* name) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   static const int kRenderProcessId = 1;
   audio_render_host_ = new AudioRendererHost(
       kRenderProcessId, audio_manager_.get(), mirroring_manager_.get(),
       media_internals_.get(), media_stream_manager_.get());
   audio_render_host_->OnChannelConnected(base::GetCurrentProcId());
@@ skipping 112 matching lines @@
 int WebRTCTransportImpl::SendPacket(int channel, const void* data, int len) {
   return network_->ReceivedRTPPacket(channel, data, len);
 }
 
 int WebRTCTransportImpl::SendRTCPPacket(int channel, const void* data,
                                         int len) {
   return network_->ReceivedRTCPPacket(channel, data, len);
 }
 
 }  // namespace content