WIP Hittest Component.

components/viz/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/frame_sinks/gpu_root_compositor_frame_sink.h"
 
 #include "cc/surfaces/compositor_frame_sink_support.h"
 #include "cc/surfaces/display.h"
 
 namespace viz {
@@ skipping 96 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_.Aggregate(display_->CurrentSurfaceId());
+}
 
 void GpuRootCompositorFrameSink::DisplayDidDrawAndSwap() {}
 
 void GpuRootCompositorFrameSink::DidReceiveCompositorFrameAck(
     const cc::ReturnedResourceArray& 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 cc::ReturnedResourceArray& resources) {
   if (client_)
     client_->ReclaimResources(resources);
 }
 
 void GpuRootCompositorFrameSink::WillDrawSurface(
     const cc::LocalSurfaceId& local_surface_id,
     const gfx::Rect& damage_rect) {}
 
 void GpuRootCompositorFrameSink::OnClientConnectionLost() {
   client_connection_lost_ = true;
   // Request destruction of |this| only if both connections are lost.
   delegate_->OnClientConnectionLost(support_->frame_sink_id(),
                                     private_connection_lost_);
 }
 
 void GpuRootCompositorFrameSink::OnPrivateConnectionLost() {
   private_connection_lost_ = true;
   // Request destruction of |this| only if both connections are lost.
   delegate_->OnPrivateConnectionLost(support_->frame_sink_id(),
                                      client_connection_lost_);
 }
 
 }  // namespace viz