Share one thread between all AudioOutputControllers instead of creating one per stream.

media/audio/openbsd/audio_manager_openbsd.cc

 // Copyright (c) 2010 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/openbsd/audio_manager_openbsd.h"
 
-#include "base/at_exit.h"
 #include "base/logging.h"
 
 namespace {
 AudioManagerOpenBSD* g_audio_manager = NULL;
 }  // namespace
 
 // Implementation of AudioManager.
 bool AudioManagerOpenBSD::HasAudioOutputDevices() {
   NOTIMPLEMENTED();
   return false;
@@ skipping 23 matching lines @@
   return NULL;
 }
 
 AudioManagerOpenBSD::AudioManagerOpenBSD() {
 }
 
 AudioManagerOpenBSD::~AudioManagerOpenBSD() {
 }
 
 void AudioManagerOpenBSD::Init() {
+  AudioManagerBase::Init();
 }
 
 void AudioManagerOpenBSD::MuteAll() {
   NOTIMPLEMENTED();
 }
 
 void AudioManagerOpenBSD::UnMuteAll() {
   NOTIMPLEMENTED();
 }
 
 void DestroyAudioManagerOpenBSD(void* not_used) {
   delete g_audio_manager;
   g_audio_manager = NULL;
 }
 
 AudioManager* AudioManager::GetAudioManager() {
   if (!g_audio_manager) {
     g_audio_manager = new AudioManagerOpenBSD();
     g_audio_manager->Init();
     base::AtExitManager::RegisterCallback(&DestroyAudioManagerOpenBSD, NULL);
   }
   return g_audio_manager;
 }
+
+// static
+AudioManager* AudioManager::CreateAudioManager() {
+  return new AudioManagerOpenBSD();
+}