[chromecast] Track MediaPipelineBackend used by CastRenderer.

chromecast/browser/media/cast_renderer.h

 // Copyright 2016 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_BROWSER_MEDIA_CAST_RENDERER_H_
 #define CHROMECAST_BROWSER_MEDIA_CAST_RENDERER_H_
 
 #include "base/memory/weak_ptr.h"
 #include "chromecast/browser/media/media_pipeline_backend_factory.h"
 #include "chromecast/browser/media/video_resolution_policy.h"
+#include "chromecast/media/base/media_resource_tracker.h"
 #include "media/base/renderer.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }  // namespace base
 
 namespace media {
 class MediaLog;
 }  // namespace media
 
 namespace chromecast {
 class TaskRunnerImpl;
 
 namespace media {
 class BalancedMediaTaskRunnerFactory;
 class CastCdmContext;
 class MediaPipelineImpl;
 
 class CastRenderer : public ::media::Renderer,
                      public VideoResolutionPolicy::Observer {
  public:
   CastRenderer(const CreateMediaPipelineBackendCB& create_backend_cb,
                const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
                const std::string& audio_device_id,
-               VideoResolutionPolicy* video_resolution_policy);
+               VideoResolutionPolicy* video_resolution_policy,
+               MediaResourceTracker* media_resource_tracker);
   ~CastRenderer() final;
 
   // ::media::Renderer implementation.
   void Initialize(::media::DemuxerStreamProvider* demuxer_stream_provider,
                   ::media::RendererClient* client,
                   const ::media::PipelineStatusCB& init_cb) final;
   void SetCdm(::media::CdmContext* cdm_context,
               const ::media::CdmAttachedCB& cdm_attached_cb) final;
   void Flush(const base::Closure& flush_cb) final;
   void StartPlayingFrom(base::TimeDelta time) final;
@@ skipping 14 matching lines @@
   void OnBufferingStateChange(::media::BufferingState state);
   void OnWaitingForDecryptionKey();
   void OnVideoNaturalSizeChange(const gfx::Size& size);
   void OnVideoOpacityChange(bool opaque);
   void CheckVideoResolutionPolicy();
 
   const CreateMediaPipelineBackendCB create_backend_cb_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   std::string audio_device_id_;
   VideoResolutionPolicy* video_resolution_policy_;
+  MediaResourceTracker* media_resource_tracker_;
+  // Must outlive |pipeline_| to properly count resource usage.
+  std::unique_ptr<MediaResourceTracker::ScopedUsage> media_resource_usage_;
+
   ::media::RendererClient* client_;
   CastCdmContext* cast_cdm_context_;
   scoped_refptr<BalancedMediaTaskRunnerFactory> media_task_runner_factory_;
   std::unique_ptr<TaskRunnerImpl> backend_task_runner_;
   std::unique_ptr<MediaPipelineImpl> pipeline_;
   bool eos_[2];
   gfx::Size video_res_;
+
   base::WeakPtrFactory<CastRenderer> weak_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(CastRenderer);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_MEDIA_CAST_RENDERER_H_