[cc] Forward BeginFrameAcks through RWHVAndroid / DFHAndroid.

ui/android/delegated_frame_host_android.cc

 // 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.
 
 #include "ui/android/delegated_frame_host_android.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "cc/layers/solid_color_layer.h"
@@ skipping 162 matching lines @@
 
 void DelegatedFrameHostAndroid::WillDrawSurface(
     const cc::LocalSurfaceId& local_surface_id,
     const gfx::Rect& damage_rect) {}
 
 void DelegatedFrameHostAndroid::OnNeedsBeginFrames(bool needs_begin_frames) {
   support_->SetNeedsBeginFrame(needs_begin_frames);
 }
 
 void DelegatedFrameHostAndroid::OnDidFinishFrame(const cc::BeginFrameAck& ack) {
+  // If there was damage, SubmitCompositorFrame includes the ack.
+  if (!ack.has_damage)
+    support_->BeginFrameDidNotSwap(ack);
 }
 
 void DelegatedFrameHostAndroid::CreateNewCompositorFrameSinkSupport() {
   support_.reset();
   support_ = base::MakeUnique<cc::CompositorFrameSinkSupport>(
       this, surface_manager_, frame_sink_id_, false /* is_root */,
       false /* handles_frame_sink_id_invalidation */,
       true /* needs_sync_points */);
 }
 
 cc::SurfaceId DelegatedFrameHostAndroid::SurfaceId() const {
   return surface_info_.id();
 }
 
 }  // namespace ui