[Chromecast] Upgrade to new CMA backend API

chromecast/public/media/audio_pipeline_device.h

-// Copyright 2014 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_PUBLIC_MEDIA_AUDIO_PIPELINE_DEVICE_H_
-#define CHROMECAST_PUBLIC_MEDIA_AUDIO_PIPELINE_DEVICE_H_
-
-#include "media_component_device.h"
-
-namespace chromecast {
-namespace media {
-class AudioPipelineDeviceClient;
-struct AudioConfig;
-
-// Interface for platform-specific audio pipeline backend.
-// See comments on MediaComponentDevice.
-class AudioPipelineDevice : public MediaComponentDevice {
- public:
-  ~AudioPipelineDevice() override {}
-
-  // Provides the audio configuration.
-  // Will be called before switching from |kStateUninitialized| to |kStateIdle|.
-  // Afterwards, this can be invoked any time the configuration changes.
-  // Returns true if the configuration is a supported configuration.
-  virtual bool SetConfig(const AudioConfig& config) = 0;
-
-  // Sets the volume multiplier.
-  // The multiplier is in the range [0.0, 1.0].
-  virtual void SetStreamVolumeMultiplier(float multiplier) = 0;
-};
-
-}  // namespace media
-}  // namespace chromecast
-
-#endif  // CHROMECAST_MEDIA_CMA_BACKEND_AUDIO_PIPELINE_DEVICE_H_