Mac: Plumb AcceleratedWidgetMac through RWHVMac

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 1251 matching lines @@
     std::unique_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) {
   DCHECK(delegated_frame_host_);
   delegated_frame_host_->BeginFrameSubscription(std::move(subscriber));
 }
 
 void RenderWidgetHostViewMac::EndFrameSubscription() {
   DCHECK(delegated_frame_host_);
   delegated_frame_host_->EndFrameSubscription();
 }
 
+ui::AcceleratedWidgetMac* RenderWidgetHostViewMac::GetAcceleratedWidgetMac()
+    const {
+  if (browser_compositor_)
+    return browser_compositor_->accelerated_widget_mac();
+  return nullptr;
+}
+
 void RenderWidgetHostViewMac::ForwardMouseEvent(const WebMouseEvent& event) {
   if (render_widget_host_)
     render_widget_host_->ForwardMouseEvent(event);
 
   if (event.type == WebInputEvent::MouseLeave) {
     [cocoa_view_ setToolTipAtMousePoint:nil];
     tooltip_text_.clear();
   }
 }
 
@@ skipping 2125 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