Implement Gesture event hit testing/forwarding for OOPIF.

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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_view_mac.h"
 
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
 #include <stdint.h>
@@ skipping 1597 matching lines @@
     const blink::WebMouseWheelEvent& event) {
   render_widget_host_->ForwardWheelEvent(event);
 }
 
 void RenderWidgetHostViewMac::ProcessTouchEvent(
     const blink::WebTouchEvent& event,
     const ui::LatencyInfo& latency) {
   render_widget_host_->ForwardTouchEventWithLatencyInfo(event, latency);
 }
 
+void RenderWidgetHostViewMac::ProcessGestureEvent(
+    const blink::WebGestureEvent& event,
+    const ui::LatencyInfo& latency) {
+  render_widget_host_->ForwardGestureEventWithLatencyInfo(event, latency);
+}
+
 void RenderWidgetHostViewMac::TransformPointToLocalCoordSpace(
     const gfx::Point& point,
     cc::SurfaceId original_surface,
     gfx::Point* transformed_point) {
   delegated_frame_host_->TransformPointToLocalCoordSpace(
       point, original_surface, transformed_point);
 }
 
 bool RenderWidgetHostViewMac::Send(IPC::Message* message) {
   if (render_widget_host_)
@@ skipping 1861 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end