Add Mojo API for Blink hit testing

content/browser/renderer_host/delegated_frame_host.cc

Index: content/browser/renderer_host/delegated_frame_host.cc
diff --git a/content/browser/renderer_host/delegated_frame_host.cc b/content/browser/renderer_host/delegated_frame_host.cc
index e320bb89498fa70d1281183dda633cc95f448911..7543308338826a36644498b246513cc204bfe0c4 100644
--- a/content/browser/renderer_host/delegated_frame_host.cc
+++ b/content/browser/renderer_host/delegated_frame_host.cc
@@ -375,10 +375,11 @@ void DelegatedFrameHost::AttemptFrameSubscriberCapture(
 }
 
 void DelegatedFrameHost::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;
 }
 
@@ -834,7 +835,8 @@ void DelegatedFrameHost::UnlockResources() {
   frame_evictor_->UnlockFrame();
 }
 
-void DelegatedFrameHost::CreateCompositorFrameSinkSupport() {
+void DelegatedFrameHost::CreateCompositorFrameSinkSupport(
+    viz::mojom::TargetFrameForInputDelegate* input_delegate) {
   DCHECK(!support_);
   constexpr bool is_root = false;
   constexpr bool handles_frame_sink_id_invalidation = false;
@@ -843,7 +845,7 @@ void DelegatedFrameHost::CreateCompositorFrameSinkSupport() {
   support_ = factory->GetContextFactoryPrivate()
                  ->GetHostFrameSinkManager()
                  ->CreateCompositorFrameSinkSupport(
-                     this, frame_sink_id_, is_root,
+                     this, input_delegate, frame_sink_id_, is_root,
                      handles_frame_sink_id_invalidation, needs_sync_points);
   if (compositor_)
     compositor_->AddFrameSink(frame_sink_id_);