Add Mojo API for Blink hit testing

content/browser/frame_host/render_widget_host_view_child_frame.cc

Index: content/browser/frame_host/render_widget_host_view_child_frame.cc
diff --git a/content/browser/frame_host/render_widget_host_view_child_frame.cc b/content/browser/frame_host/render_widget_host_view_child_frame.cc
index bce28b8d43586cd45cbb5e8841a98baff51a5626..9ec5666c8e44678106b6d824abe22e41c0a2bdf4 100644
--- a/content/browser/frame_host/render_widget_host_view_child_frame.cc
+++ b/content/browser/frame_host/render_widget_host_view_child_frame.cc
@@ -446,10 +446,11 @@ void RenderWidgetHostViewChildFrame::DidReceiveCompositorFrameAck(
 }
 
 void RenderWidgetHostViewChildFrame::DidCreateNewRendererCompositorFrameSink(
-    viz::mojom::CompositorFrameSinkClient* renderer_compositor_frame_sink) {
+    viz::mojom::CompositorFrameSinkClient* renderer_compositor_frame_sink,
+    viz::mojom::TargetFrameForInputDelegate* input_delegate) {
   ResetCompositorFrameSinkSupport();
   renderer_compositor_frame_sink_ = renderer_compositor_frame_sink;
-  CreateCompositorFrameSinkSupport();
+  CreateCompositorFrameSinkSupport(input_delegate);
   has_frame_ = false;
 }
 
@@ -835,7 +836,8 @@ viz::SurfaceId RenderWidgetHostViewChildFrame::SurfaceIdForTesting() const {
   return viz::SurfaceId(frame_sink_id_, local_surface_id_);
 }
 
-void RenderWidgetHostViewChildFrame::CreateCompositorFrameSinkSupport() {
+void RenderWidgetHostViewChildFrame::CreateCompositorFrameSinkSupport(
+    viz::mojom::TargetFrameForInputDelegate* input_delegate) {
   if (service_manager::ServiceManagerIsRemote())
     return;
 
@@ -844,8 +846,8 @@ void RenderWidgetHostViewChildFrame::CreateCompositorFrameSinkSupport() {
   constexpr bool handles_frame_sink_id_invalidation = false;
   constexpr bool needs_sync_points = true;
   support_ = GetHostFrameSinkManager()->CreateCompositorFrameSinkSupport(
-      this, frame_sink_id_, is_root, handles_frame_sink_id_invalidation,
-      needs_sync_points);
+      this, input_delegate, frame_sink_id_, is_root,
+      handles_frame_sink_id_invalidation, needs_sync_points);
   if (parent_frame_sink_id_.is_valid()) {
     GetHostFrameSinkManager()->RegisterFrameSinkHierarchy(parent_frame_sink_id_,
                                                           frame_sink_id_);