Add Mojo API for Blink hit testing

content/browser/frame_host/render_widget_host_view_child_frame.h

 // Copyright 2014 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.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 97 matching lines @@
   void UpdateCursor(const WebCursor& cursor) override;
   void SetIsLoading(bool is_loading) override;
   void RenderProcessGone(base::TerminationStatus status,
                          int error_code) override;
   void Destroy() override;
   void SetTooltipText(const base::string16& tooltip_text) override;
   bool HasAcceleratedSurface(const gfx::Size& desired_size) override;
   void GestureEventAck(const blink::WebGestureEvent& event,
                        InputEventAckState ack_result) override;
   void DidCreateNewRendererCompositorFrameSink(
-      viz::mojom::CompositorFrameSinkClient* renderer_compositor_frame_sink)
-      override;
+      viz::mojom::CompositorFrameSinkClient* renderer_compositor_frame_sink,
+      viz::mojom::FrameInputHitTest*) override;
   void SubmitCompositorFrame(const viz::LocalSurfaceId& local_surface_id,
                              cc::CompositorFrame frame) override;
   void OnDidNotProduceFrame(const viz::BeginFrameAck& ack) override;
   void OnSurfaceChanged(const viz::SurfaceInfo& surface_info) override;
   // Since the URL of content rendered by this class is not displayed in
   // the URL bar, this method does not need an implementation.
   void ClearCompositorFrame() override {}
   gfx::Rect GetBoundsInRootWindow() override;
   void ProcessAckedTouchEvent(const TouchEventWithLatencyInfo& touch,
                               InputEventAckState ack_result) override;
@@ skipping 130 matching lines @@
  private:
   virtual void SendSurfaceInfoToEmbedderImpl(
       const viz::SurfaceInfo& surface_info,
       const viz::SurfaceSequence& sequence);
 
   void SubmitSurfaceCopyRequest(const gfx::Rect& src_subrect,
                                 const gfx::Size& dst_size,
                                 const ReadbackRequestCallback& callback,
                                 const SkColorType preferred_color_type);
 
-  void CreateCompositorFrameSinkSupport();
+  void CreateCompositorFrameSinkSupport(
+      viz::mojom::FrameInputHitTest* = nullptr);
   void ResetCompositorFrameSinkSupport();
   void DetachFromTouchSelectionClientManagerIfNecessary();
 
   virtual bool HasEmbedderChanged();
 
   using FrameSwappedCallbackList = std::deque<std::unique_ptr<base::Closure>>;
   // Since frame-drawn callbacks are "fire once", we use std::deque to make
   // it convenient to swap() when processing the list.
   FrameSwappedCallbackList frame_swapped_callbacks_;
 
@@ skipping 10 matching lines @@
   std::unique_ptr<TouchSelectionControllerClientChildFrame>
       selection_controller_client_;
 
   base::WeakPtrFactory<RenderWidgetHostViewChildFrame> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewChildFrame);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_