[cc] Fix CompositorFrameSinkSupport BeginFrameAck interface.

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 834 matching lines @@
     // confirming newer sequence numbers.
     modified_ack.has_damage = false;
     modified_ack.latest_confirmed_sequence_number =
         latest_confirmed_begin_frame_sequence_number_;
   } else {
     latest_confirmed_begin_frame_source_id_ = modified_ack.source_id;
     latest_confirmed_begin_frame_sequence_number_ =
         modified_ack.latest_confirmed_sequence_number;
   }
 
-  // TODO(eseckler): The interface to CompositorFrameSinkSupport should use
-  // SubmitCompositorFrame and BeginFrameDidNotSwap instead of DidFinishFrame.
-  support_->DidFinishFrame(modified_ack);
+  // If there was damage, the unmodified ack was sent with the CompositorFrame.
+  if (!modified_ack.has_damage)
+    support_->BeginFrameDidNotSwap(modified_ack);
 }
 
 void DelegatedFrameHost::CreateCompositorFrameSinkSupport() {
   DCHECK(!support_);
   ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
   support_ = base::MakeUnique<cc::CompositorFrameSinkSupport>(
       this, factory->GetContextFactoryPrivate()->GetSurfaceManager(),
       frame_sink_id_, false /* is_root */,
       false /* handles_frame_sink_id_invalidation */,
       true /* needs_sync_points */);
   if (compositor_)
     compositor_->AddFrameSink(frame_sink_id_);
   if (needs_begin_frame_)
     support_->SetNeedsBeginFrame(true);
 }
 
 void DelegatedFrameHost::ResetCompositorFrameSinkSupport() {
   if (!support_)
     return;
   if (compositor_)
     compositor_->RemoveFrameSink(frame_sink_id_);
   support_.reset();
 }
 
 }  // namespace content