[Chromecast] Upgrade to new CMA backend API

chromecast/media/cma/pipeline/media_component_device_client_impl.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_CMA_PIPELINE_MEDIA_COMPONENT_DEVICE_CLIENT_IMPL_H_
-#define CHROMECAST_MEDIA_CMA_PIPELINE_MEDIA_COMPONENT_DEVICE_CLIENT_IMPL_H_
-
-#include "base/callback.h"
-#include "base/memory/ref_counted.h"
-#include "chromecast/public/media/media_component_device.h"
-#include "chromecast/public/media/video_pipeline_device.h"
-
-namespace base {
-class SingleThreadTaskRunner;
-}
-
-namespace chromecast {
-namespace media {
-
-// Helper for implementing MediaComponentDevice::Client with
-// a base::Callback.
-class MediaComponentDeviceClientImpl : public MediaComponentDevice::Client {
- public:
-  MediaComponentDeviceClientImpl(const base::Closure& eos_cb);
-  ~MediaComponentDeviceClientImpl() override;
-
-  void OnEndOfStream() override;
-
- private:
-  base::Closure eos_cb_;
-  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-};
-
-}  // namespace media
-}  // namespace chromecast
-
-#endif  // CHROMECAST_MEDIA_CMA_PIPELINE_MEDIA_COMPONENT_DEVICE_CLIENT_IMPL_H_