Add Mojo API for Blink hit testing

content/browser/renderer_host/render_widget_host_view_aura.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 151 matching lines @@
   InputEventAckState FilterChildGestureEvent(
       const blink::WebGestureEvent& gesture_event) override;
   BrowserAccessibilityManager* CreateBrowserAccessibilityManager(
       BrowserAccessibilityDelegate* delegate, bool for_root_frame) override;
   gfx::AcceleratedWidget AccessibilityGetAcceleratedWidget() override;
   gfx::NativeViewAccessible AccessibilityGetNativeViewAccessible() override;
   void SetMainFrameAXTreeID(ui::AXTreeIDRegistry::AXTreeID id) override;
   bool LockMouse() override;
   void UnlockMouse() override;
   void DidCreateNewRendererCompositorFrameSink(
-      viz::mojom::CompositorFrameSinkClient* renderer_compositor_frame_sink)
-      override;
+      viz::mojom::CompositorFrameSinkClient* renderer_compositor_frame_sink,
+      viz::mojom::TargetFrameForInputDelegate*) override;
   void SubmitCompositorFrame(const viz::LocalSurfaceId& local_surface_id,
                              cc::CompositorFrame frame) override;
   void OnDidNotProduceFrame(const viz::BeginFrameAck& ack) override;
   void ClearCompositorFrame() override;
   void DidStopFlinging() override;
   void OnDidNavigateMainFrameToNewPage() override;
   viz::FrameSinkId GetFrameSinkId() override;
   viz::LocalSurfaceId GetLocalSurfaceId() const override;
   viz::FrameSinkId FrameSinkIdAtPoint(viz::SurfaceHittestDelegate* delegate,
                                       const gfx::Point& point,
@@ skipping 411 matching lines @@
   std::unique_ptr<wm::ScopedTooltipDisabler> tooltip_disabler_;
 
   // True when this view acts as a platform view hack for a
   // RenderWidgetHostViewGuest.
   bool is_guest_view_hack_;
 
   float device_scale_factor_;
 
   viz::mojom::CompositorFrameSinkClient* renderer_compositor_frame_sink_ =
       nullptr;
+  viz::mojom::TargetFrameForInputDelegate* target_frame_for_input_delegate_ =
+      nullptr;
 
   // While this is a ui::EventHandler for targetting, |event_handler_| actually
   // provides an implementation, and directs events to |host_|.
   std::unique_ptr<RenderWidgetHostViewEventHandler> event_handler_;
 
   viz::FrameSinkId frame_sink_id_;
   viz::LocalSurfaceId local_surface_id_;
 
   std::unique_ptr<CursorManager> cursor_manager_;
 
   base::WeakPtrFactory<RenderWidgetHostViewAura> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAura);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_