Remove SendBeginFramesToChildren plumbing

content/browser/renderer_host/delegated_frame_host.cc

 // 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.
 
 #include "content/browser/renderer_host/delegated_frame_host.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 533 matching lines @@
 
 void DelegatedFrameHost::WillDrawSurface(cc::SurfaceId id,
                                          const gfx::Rect& damage_rect) {
   if (id != surface_id_)
     return;
   AttemptFrameSubscriberCapture(damage_rect);
 }
 
 void DelegatedFrameHost::SetBeginFrameSource(
     cc::BeginFrameSource* begin_frame_source) {
-  // TODO(enne): forward this to DelegatedFrameHostClient to observe and then to
-  // the renderer as an external begin frame source.
+  client_->SetBeginFrameSource(begin_frame_source);
 }
 
 void DelegatedFrameHost::EvictDelegatedFrame() {
   client_->DelegatedFrameHostGetLayer()->SetShowSolidColorContent();
   if (!surface_id_.is_null()) {
     surface_factory_->Destroy(surface_id_);
     surface_id_ = cc::SurfaceId();
   }
   delegated_frame_evictor_->DiscardedFrame();
   UpdateGutters();
@@ skipping 316 matching lines @@
     cc::SurfaceManager* manager = factory->GetSurfaceManager();
     new_layer->SetShowSurface(
         surface_id_, base::Bind(&SatisfyCallback, base::Unretained(manager)),
         base::Bind(&RequireCallback, base::Unretained(manager)),
         current_surface_size_, current_scale_factor_,
         current_frame_size_in_dip_);
   }
 }
 
 }  // namespace content