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

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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/renderer/gpu/render_widget_compositor.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <limits>
@@ skipping 1029 matching lines @@
 void RenderWidgetCompositor::BeginMainFrame(const cc::BeginFrameArgs& args) {
   compositor_deps_->GetRendererScheduler()->WillBeginFrame(args);
   double frame_time_sec = (args.frame_time - base::TimeTicks()).InSecondsF();
   delegate_->BeginMainFrame(frame_time_sec);
 }
 
 void RenderWidgetCompositor::BeginMainFrameNotExpectedSoon() {
   compositor_deps_->GetRendererScheduler()->BeginFrameNotExpectedSoon();
 }
 
+void RenderWidgetCompositor::DoShortIdleWork(const cc::BeginFrameArgs& args) {
+  compositor_deps_->GetRendererScheduler()->DoShortIdleWork(args);
+}
+
 void RenderWidgetCompositor::UpdateLayerTreeHost() {
   delegate_->UpdateVisualState();
 }
 
 void RenderWidgetCompositor::ApplyViewportDeltas(
     const gfx::Vector2dF& inner_delta,
     const gfx::Vector2dF& outer_delta,
     const gfx::Vector2dF& elastic_overscroll_delta,
     float page_scale,
     float top_controls_delta) {
@@ skipping 85 matching lines @@
 void RenderWidgetCompositor::SetContentSourceId(uint32_t id) {
   layer_tree_host_->SetContentSourceId(id);
 }
 
 void RenderWidgetCompositor::SetLocalSurfaceId(
     const cc::LocalSurfaceId& local_surface_id) {
   layer_tree_host_->SetLocalSurfaceId(local_surface_id);
 }
 
 }  // namespace content