Allow content embedders to create AudioManager.

chromecast/media/audio/cast_audio_manager_factory.h

-// 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.
-
-#ifndef CHROMECAST_MEDIA_AUDIO_CAST_AUDIO_MANAGER_FACTORY_H_
-#define CHROMECAST_MEDIA_AUDIO_CAST_AUDIO_MANAGER_FACTORY_H_
-
-#include "base/macros.h"
-#include "media/audio/audio_manager_factory.h"
-
-namespace chromecast {
-namespace media {
-
-class MediaPipelineBackendManager;
-
-class CastAudioManagerFactory : public ::media::AudioManagerFactory {
- public:
-  explicit CastAudioManagerFactory(
-      MediaPipelineBackendManager* backend_manager);
-  ~CastAudioManagerFactory() override;
-
-  // ::media::AudioManagerFactory overrides.
-  scoped_ptr<::media::AudioManager, ::media::AudioManagerDeleter>
-  CreateInstance(scoped_refptr<base::SingleThreadTaskRunner> task_runner,
-                 scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner,
-                 ::media::AudioLogFactory* audio_log_factory) override;
-
- private:
-  MediaPipelineBackendManager* const backend_manager_;
-
-  DISALLOW_COPY_AND_ASSIGN(CastAudioManagerFactory);
-};
-
-}  // namespace media
-}  // namespace chromecast
-
-#endif  // CHROMECAST_MEDIA_AUDIO_CAST_AUDIO_MANAGER_FACTORY_H_