Use HitTestAggregator in GpuRootCompositorFrameSink

components/viz/service/frame_sinks/gpu_root_compositor_frame_sink.cc

 // Copyright 2017 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 "components/viz/service/frame_sinks/gpu_root_compositor_frame_sink.h"
 
 #include <utility>
 
+#include "base/command_line.h"
 #include "components/viz/service/display/display.h"
 #include "components/viz/service/frame_sinks/compositor_frame_sink_support.h"
 #include "components/viz/service/frame_sinks/frame_sink_manager.h"
 
 namespace viz {
 
 GpuRootCompositorFrameSink::GpuRootCompositorFrameSink(
     GpuCompositorFrameSinkDelegate* delegate,
     FrameSinkManager* frame_sink_manager,
     const FrameSinkId& frame_sink_id,
@@ skipping 92 matching lines @@
   support_->RequestCopyOfSurface(std::move(request));
 }
 
 void GpuRootCompositorFrameSink::DisplayOutputSurfaceLost() {
   // TODO(staraz): Implement this. Client should hear about context/output
   // surface lost.
 }
 
 void GpuRootCompositorFrameSink::DisplayWillDrawAndSwap(
     bool will_draw_and_swap,
-    const cc::RenderPassList& render_pass) {}
+    const cc::RenderPassList& render_pass) {
+  hit_test_aggregator_.PostTaskAggregate(display_->CurrentSurfaceId());
+}
 
 void GpuRootCompositorFrameSink::DisplayDidDrawAndSwap() {}
 
 void GpuRootCompositorFrameSink::DidReceiveCompositorFrameAck(
     const std::vector<cc::ReturnedResource>& resources) {
   if (client_)
     client_->DidReceiveCompositorFrameAck(resources);
 }
 
 void GpuRootCompositorFrameSink::OnBeginFrame(const cc::BeginFrameArgs& args) {
+  hit_test_aggregator_.Swap();
   if (client_)
     client_->OnBeginFrame(args);
 }
 
 void GpuRootCompositorFrameSink::ReclaimResources(
     const std::vector<cc::ReturnedResource>& resources) {
   if (client_)
     client_->ReclaimResources(resources);
 }
 
 void GpuRootCompositorFrameSink::WillDrawSurface(
     const LocalSurfaceId& local_surface_id,
     const gfx::Rect& damage_rect) {}
 
 void GpuRootCompositorFrameSink::OnClientConnectionLost() {
   delegate_->OnClientConnectionLost(support_->frame_sink_id());
 }
 
 void GpuRootCompositorFrameSink::OnPrivateConnectionLost() {
   delegate_->OnPrivateConnectionLost(support_->frame_sink_id());
 }
 
 }  // namespace viz