Use HitTestAggregator in GpuRootCompositorFrameSink

components/viz/service/frame_sinks/gpu_root_compositor_frame_sink.cc

Index: components/viz/service/frame_sinks/gpu_root_compositor_frame_sink.cc
diff --git a/components/viz/service/frame_sinks/gpu_root_compositor_frame_sink.cc b/components/viz/service/frame_sinks/gpu_root_compositor_frame_sink.cc
index 41bde869157a37b7bdcbe5f882b807a1971f8cef..01bbb9513d931a6aae1542774375898606bd5059 100644
--- a/components/viz/service/frame_sinks/gpu_root_compositor_frame_sink.cc
+++ b/components/viz/service/frame_sinks/gpu_root_compositor_frame_sink.cc
@@ -6,6 +6,7 @@
 
 #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"
@@ -118,7 +119,9 @@ void GpuRootCompositorFrameSink::DisplayOutputSurfaceLost() {
 
 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() {}
 
@@ -129,6 +132,7 @@ void GpuRootCompositorFrameSink::DidReceiveCompositorFrameAck(
 }
 
 void GpuRootCompositorFrameSink::OnBeginFrame(const cc::BeginFrameArgs& args) {
+  hit_test_aggregator_.Swap();
   if (client_)
     client_->OnBeginFrame(args);
 }