Check if the delegate changed the visibility of child MenuItemViews.

ui/views/controls/menu/menu_model_adapter.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 UI_VIEWS_CONTROLS_MENU_MENU_MODEL_ADAPTER_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_MODEL_ADAPTER_H_
 
 #include <map>
 
 #include "ui/views/controls/menu/menu_delegate.h"
@@ skipping 53 matching lines @@
   // views::MenuDelegate implementation.
   virtual void ExecuteCommand(int id) OVERRIDE;
   virtual void ExecuteCommand(int id, int mouse_event_flags) OVERRIDE;
   virtual bool IsTriggerableEvent(MenuItemView* source,
                                   const ui::Event& e) OVERRIDE;
   virtual bool GetAccelerator(int id,
                               ui::Accelerator* accelerator) const OVERRIDE;
   virtual base::string16 GetLabel(int id) const OVERRIDE;
   virtual const gfx::FontList* GetLabelFontList(int id) const OVERRIDE;
   virtual bool IsCommandEnabled(int id) const OVERRIDE;
+  virtual bool IsCommandVisible(int id) const OVERRIDE;
   virtual bool IsItemChecked(int id) const OVERRIDE;
   virtual void SelectionChanged(MenuItemView* menu) OVERRIDE;
   virtual void WillShowMenu(MenuItemView* menu) OVERRIDE;
   virtual void WillHideMenu(MenuItemView* menu) OVERRIDE;
 
  private:
   // Implementation of BuildMenu().
   void BuildMenuImpl(MenuItemView* menu, ui::MenuModel* model);
 
   // Container of ui::MenuModel pointers as encountered by preorder
   // traversal.  The first element is always the top-level model
   // passed to the constructor.
   ui::MenuModel* menu_model_;
 
   // Mouse event flags which can trigger menu actions.
   int triggerable_event_flags_;
 
   // Map MenuItems to MenuModels.  Used to implement WillShowMenu().
   std::map<MenuItemView*, ui::MenuModel*> menu_map_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuModelAdapter);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_MODEL_ADAPTER_H_