Allow content embedders to create AudioManager.

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"
-#include "chromecast/media/cma/backend/media_pipeline_backend_manager.h"
-
-namespace chromecast {
-namespace media {
-
-CastAudioManagerFactory::CastAudioManagerFactory(
-    MediaPipelineBackendManager* backend_manager)
-    : backend_manager_(backend_manager) {
-}
-
-CastAudioManagerFactory::~CastAudioManagerFactory() {}
-
-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 scoped_ptr<::media::AudioManager, ::media::AudioManagerDeleter>(
-      new CastAudioManager(std::move(task_runner),
-                           std::move(worker_task_runner), audio_log_factory,
-                           backend_manager_));
-}
-
-}  // namespace media
-}  // namespace chromecast