cc: Add support for sending BeginFrames for video.

cc/layers/video_frame_provider_client_impl.h

 // Copyright 2013 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 CC_LAYERS_VIDEO_FRAME_PROVIDER_CLIENT_IMPL_H_
 #define CC_LAYERS_VIDEO_FRAME_PROVIDER_CLIENT_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 #include "cc/base/cc_export.h"
 #include "cc/layers/video_frame_provider.h"
+#include "cc/scheduler/video_frame_controller.h"
 #include "ui/gfx/transform.h"
 
 namespace media { class VideoFrame; }
 
 namespace cc {
 class VideoLayerImpl;
 
 // VideoFrameProviderClientImpl liasons with the VideoFrameProvider and the
 // VideoLayer. It receives updates from the provider and updates the layer as a
 // result. It also allows the layer to access the video frame that the provider
 // has.
 class CC_EXPORT VideoFrameProviderClientImpl
     : public VideoFrameProvider::Client,
+      public VideoFrameController,
       public base::RefCounted<VideoFrameProviderClientImpl> {
  public:
   // Must be created on the impl thread while the main thread is blocked.
   static scoped_refptr<VideoFrameProviderClientImpl> Create(
-      VideoFrameProvider* provider);
+      VideoFrameProvider* provider,
+      VideoFrameControllerClient* client);
 
   VideoLayerImpl* ActiveVideoLayer() const;
   void SetActiveVideoLayer(VideoLayerImpl* video_layer);
 
   bool Stopped() const;
   // Must be called on the impl thread while the main thread is blocked.
   void Stop();
 
   scoped_refptr<media::VideoFrame> AcquireLockAndCurrentFrame();
   void PutCurrentFrame();
   void ReleaseLock();
 
   const gfx::Transform& StreamTextureMatrix() const;
 
+  // VideoFrameController implementation.
+  void OnBeginFrame(const BeginFrameArgs& args) override;
+
   // VideoFrameProvider::Client implementation.
   // Called on the main thread.
   void StopUsingProvider() override;
   // Called on the impl thread.
   void StartRendering() override;
   void StopRendering() override;
   void DidReceiveFrame() override;
   void DidUpdateMatrix(const float* matrix) override;
 
  private:
   friend class base::RefCounted<VideoFrameProviderClientImpl>;
 
-  explicit VideoFrameProviderClientImpl(VideoFrameProvider* provider);
+  VideoFrameProviderClientImpl(VideoFrameProvider* provider,
+                               VideoFrameControllerClient* client);
   ~VideoFrameProviderClientImpl() override;
 
   VideoFrameProvider* provider_;
+  VideoFrameControllerClient* client_;
   VideoLayerImpl* active_video_layer_;
   bool stopped_;
 
   // Since the provider lives on another thread, it can be destroyed while the
   // frame controller are accessing its frame. Before being destroyed the
   // provider calls StopUsingProvider. provider_lock_ blocks StopUsingProvider
   // from returning until the frame controller is done using the frame.
   base::Lock provider_lock_;
   base::ThreadChecker thread_checker_;
 
   gfx::Transform stream_texture_matrix_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoFrameProviderClientImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_VIDEO_FRAME_PROVIDER_CLIENT_IMPL_H_