Revert of Pass task runners to AudioManager constructor.

media/audio/mock_audio_manager.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/mock_audio_manager.h"
 
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "media/audio/audio_parameters.h"
 
 namespace media {
 
 MockAudioManager::MockAudioManager(
-    scoped_refptr<base::SingleThreadTaskRunner> task_runner)
-    : AudioManager(task_runner, task_runner) {}
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
+    : task_runner_(task_runner) {}
 
 MockAudioManager::~MockAudioManager() {
 }
 
 bool MockAudioManager::HasAudioOutputDevices() {
   return true;
 }
 
 bool MockAudioManager::HasAudioInputDevices() {
   return true;
@@ skipping 30 matching lines @@
   return NULL;
 }
 
 media::AudioInputStream* MockAudioManager::MakeAudioInputStream(
     const media::AudioParameters& params,
     const std::string& device_id) {
   NOTREACHED();
   return NULL;
 }
 
+scoped_refptr<base::SingleThreadTaskRunner> MockAudioManager::GetTaskRunner() {
+  return task_runner_;
+}
+
+scoped_refptr<base::SingleThreadTaskRunner>
+MockAudioManager::GetWorkerTaskRunner() {
+  return task_runner_;
+}
+
 void MockAudioManager::AddOutputDeviceChangeListener(
     AudioDeviceListener* listener) {
 }
 
 void MockAudioManager::RemoveOutputDeviceChangeListener(
     AudioDeviceListener* listener) {
 }
 
 AudioParameters MockAudioManager::GetDefaultOutputStreamParameters() {
   return AudioParameters();
@@ skipping 13 matching lines @@
     const std::string& input_device_id) {
   return std::string();
 }
 
 scoped_ptr<AudioLog> MockAudioManager::CreateAudioLog(
     AudioLogFactory::AudioComponent component) {
   return scoped_ptr<AudioLog>();
 }
 
 }  // namespace media.