Revert of Revert of Chromecast: Play audio streams not supported by CMA via default renderer

chromecast/renderer/media/cma_media_renderer_factory.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_RENDERER_MEDIA_CMA_MEDIA_RENDERER_FACTORY_H_
-#define CHROMECAST_RENDERER_MEDIA_CMA_MEDIA_RENDERER_FACTORY_H_
-
-#include "base/macros.h"
-#include "media/base/renderer_factory.h"
-
-namespace chromecast {
-namespace media {
-
-class CmaMediaRendererFactory : public ::media::RendererFactory {
- public:
-  explicit CmaMediaRendererFactory(int render_frame_id);
-  ~CmaMediaRendererFactory() final;
-
-  // ::media::RendererFactory implementation.
-  scoped_ptr< ::media::Renderer> CreateRenderer(
-      const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
-      ::media::AudioRendererSink* audio_renderer_sink) final;
-
- private:
-  int render_frame_id_;
-  DISALLOW_COPY_AND_ASSIGN(CmaMediaRendererFactory);
-};
-
-}  // namespace media
-}  // namespace chromecast
-
-#endif  // CHROMECAST_RENDERER_MEDIA_CMA_MEDIA_RENDERER_FACTORY_H_