Create a new action triggered when a BeginMainFrame is not expected before vsync

cc/trees/layer_tree_host.cc

 // Copyright 2011 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 "cc/trees/layer_tree_host.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 232 matching lines @@
 
 void LayerTreeHost::DidBeginMainFrame() {
   inside_main_frame_ = false;
   client_->DidBeginMainFrame();
 }
 
 void LayerTreeHost::BeginMainFrameNotExpectedSoon() {
   client_->BeginMainFrameNotExpectedSoon();
 }
 
+void LayerTreeHost::DoShortIdleWork(const BeginFrameArgs& args) {
+  client_->DoShortIdleWork(args);
+}
+
 void LayerTreeHost::BeginMainFrame(const BeginFrameArgs& args) {
   client_->BeginMainFrame(args);
 }
 
 void LayerTreeHost::DidStopFlinging() {
   proxy_->MainThreadHasStoppedFlinging();
 }
 
 const LayerTreeDebugState& LayerTreeHost::GetDebugState() const {
   return debug_state_;
@@ skipping 1083 matching lines @@
 LayerListReverseIterator<Layer> LayerTreeHost::rend() {
   return LayerListReverseIterator<Layer>(nullptr);
 }
 
 void LayerTreeHost::SetNeedsDisplayOnAllLayers() {
   for (auto* layer : *this)
     layer->SetNeedsDisplay();
 }
 
 }  // namespace cc