Remove SendBeginFramesToChildren plumbing

content/browser/renderer_host/delegated_frame_host.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 CONTENT_BROWSER_RENDERER_HOST_DELEGATED_FRAME_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_DELEGATED_FRAME_HOST_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 55 matching lines @@
       int output_surface_id,
       const cc::CompositorFrameAck& ack) = 0;
   virtual void DelegatedFrameHostSendReclaimCompositorResources(
       int output_surface_id,
       const cc::CompositorFrameAck& ack) = 0;
   virtual void DelegatedFrameHostOnLostCompositorResources() = 0;
 
   virtual void DelegatedFrameHostUpdateVSyncParameters(
       const base::TimeTicks& timebase,
       const base::TimeDelta& interval) = 0;
+  virtual void SetBeginFrameSource(cc::BeginFrameSource* source) = 0;
 };
 
 // The DelegatedFrameHost is used to host all of the RenderWidgetHostView state
 // and functionality that is associated with delegated frames being sent from
 // the RenderWidget. The DelegatedFrameHost will push these changes through to
 // the ui::Compositor associated with its DelegatedFrameHostClient.
 class CONTENT_EXPORT DelegatedFrameHost
     : public ui::CompositorObserver,
       public ui::CompositorVSyncManager::Observer,
       public ui::LayerOwnerDelegate,
@@ skipping 229 matching lines @@
 
   // YUV readback pipeline.
   std::unique_ptr<content::ReadbackYUVInterface> yuv_readback_pipeline_;
 
   std::unique_ptr<DelegatedFrameEvictor> delegated_frame_evictor_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_DELEGATED_FRAME_HOST_H_