Add Mojo API for Blink hit testing

content/browser/renderer_host/render_widget_host_impl.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 
 #include <set>
 #include <tuple>
@@ skipping 403 matching lines @@
 }
 
 // static
 RenderWidgetHostImpl* RenderWidgetHostImpl::From(RenderWidgetHost* rwh) {
   return static_cast<RenderWidgetHostImpl*>(rwh);
 }
 
 void RenderWidgetHostImpl::SetView(RenderWidgetHostViewBase* view) {
   if (view) {
     view_ = view->GetWeakPtr();
-    if (renderer_compositor_frame_sink_.is_bound()) {
+    if (renderer_compositor_frame_sink_.is_bound() &&
+        target_frame_for_input_delegate_.is_bound()) {
       view->DidCreateNewRendererCompositorFrameSink(
-          renderer_compositor_frame_sink_.get());
+          renderer_compositor_frame_sink_.get(),
+          target_frame_for_input_delegate_.get());
     }
     // Views start out not needing begin frames, so only update its state
     // if the value has changed.
     if (needs_begin_frames_)
       view_->SetNeedsBeginFrames(needs_begin_frames_);
   } else {
     view_.reset();
   }
 
   synthetic_gesture_controller_.reset();
@@ skipping 2106 matching lines @@
                                                      bool monitor_updates) {
   if (!immediate_request && monitor_updates == monitoring_composition_info_)
     return;
   monitoring_composition_info_ = monitor_updates;
   GetWidgetInputHandler()->RequestCompositionUpdates(immediate_request,
                                                      monitor_updates);
 }
 
 void RenderWidgetHostImpl::RequestCompositorFrameSink(
     viz::mojom::CompositorFrameSinkRequest request,
-    viz::mojom::CompositorFrameSinkClientPtr client) {
+    viz::mojom::CompositorFrameSinkClientPtr client,
+    viz::mojom::TargetFrameForInputDelegatePtr input_delegate) {
   if (compositor_frame_sink_binding_.is_bound())
     compositor_frame_sink_binding_.Close();
   compositor_frame_sink_binding_.Bind(
       std::move(request),
       BrowserMainLoop::GetInstance()->GetResizeTaskRunner());
   if (view_)
-    view_->DidCreateNewRendererCompositorFrameSink(client.get());
+    view_->DidCreateNewRendererCompositorFrameSink(client.get(),
+                                                   input_delegate.get());
   renderer_compositor_frame_sink_ = std::move(client);
+  target_frame_for_input_delegate_ = std::move(input_delegate);
 }
 
 bool RenderWidgetHostImpl::HasGestureStopped() {
   return !input_router_->HasPendingEvents();
 }
 
 void RenderWidgetHostImpl::SetNeedsBeginFrame(bool needs_begin_frame) {
   OnSetNeedsBeginFrames(needs_begin_frame);
 }
 
@@ skipping 136 matching lines @@
       sequence_number >= saved_frame_.max_shared_bitmap_sequence_number) {
     SubmitCompositorFrame(saved_frame_.local_surface_id,
                           std::move(saved_frame_.frame));
     saved_frame_.local_surface_id = viz::LocalSurfaceId();
     compositor_frame_sink_binding_.ResumeIncomingMethodCallProcessing();
     TRACE_EVENT_ASYNC_END0("renderer_host", "PauseCompositorFrameSink", this);
   }
 }
 
 }  // namespace content