Add OVERRIDE to content/.

content/browser/renderer_host/render_widget_host_view_mac.h

 // Copyright (c) 2011 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_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 #pragma once
 
 #if defined(__OBJC__)
 
@@ skipping 260 matching lines @@
   bool is_showing_context_menu() const { return is_showing_context_menu_; }
 
   void DrawAcceleratedSurfaceInstance(
       CGLContextObj context,
       gfx::PluginWindowHandle plugin_handle,
       NSSize size);
   // Forces the textures associated with any accelerated plugin instances
   // to be reloaded.
   void ForceTextureReload();
 
-  virtual void SetVisuallyDeemphasized(const SkColor* color, bool animate);
+  virtual void SetVisuallyDeemphasized(const SkColor* color,
+                                       bool animate) OVERRIDE;
 
   virtual void UnhandledWheelEvent(
       const WebKit::WebMouseWheelEvent& event) OVERRIDE;
   virtual void SetHasHorizontalScrollbar(
       bool has_horizontal_scrollbar) OVERRIDE;
   virtual void SetScrollOffsetPinning(
       bool is_pinned_to_left, bool is_pinned_to_right) OVERRIDE;
 
   virtual bool LockMouse() OVERRIDE;
   virtual void UnlockMouse() OVERRIDE;
@@ skipping 124 matching lines @@
 
 class RenderWidgetHostView;
 class RenderWidgetHost;
 
 namespace render_widget_host_view_mac {
 CONTENT_EXPORT RenderWidgetHostView* CreateRenderWidgetHostView(
     RenderWidgetHost* widget);
 }
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_