Pass task runners to AudioManager constructor.

chromecast/media/audio/cast_audio_manager_factory.cc

 // Copyright 2015 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 "chromecast/media/audio/cast_audio_manager_factory.h"
 
 #include "chromecast/media/audio/cast_audio_manager.h"
 
 namespace chromecast {
 namespace media {
 
 CastAudioManagerFactory::CastAudioManagerFactory() {}
 
 CastAudioManagerFactory::~CastAudioManagerFactory() {}
 
-::media::AudioManager* CastAudioManagerFactory::CreateInstance(
+scoped_ptr<::media::AudioManager, ::media::AudioManagerDeleter>
+CastAudioManagerFactory::CreateInstance(
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner,
     ::media::AudioLogFactory* audio_log_factory) {
-  return new CastAudioManager(audio_log_factory);
+  return scoped_ptr<::media::AudioManager, ::media::AudioManagerDeleter>(
+      new CastAudioManager(std::move(task_runner),
+                           std::move(worker_task_runner), audio_log_factory));
 }
 
 }  // namespace media
 }  // namespace chromecast