backup for dynamic recent tabs submenu

ui/base/models/simple_menu_model.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_BASE_MODELS_SIMPLE_MENU_MODEL_H_
 #define UI_BASE_MODELS_SIMPLE_MENU_MODEL_H_
 
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 103 matching lines @@
                          int group_id);
   void InsertRadioItemWithStringIdAt(
       int index, int command_id, int string_id, int group_id);
   void InsertSubMenuAt(int index,
                        int command_id,
                        const base::string16& label,
                        MenuModel* model);
   void InsertSubMenuWithStringIdAt(
       int index, int command_id, int string_id, MenuModel* model);
 
+  // Remove item at specified index from the model.
+  void RemoveItemAt(int index);
+
   // Sets the icon for the item at |index|.
   void SetIcon(int index, const gfx::Image& icon);
 
   // Sets the sublabel for the item at |index|.
   void SetSublabel(int index, const base::string16& sublabel);
 
   // Sets the minor text for the item at |index|.
   void SetMinorText(int index, const base::string16& minor_text);
 
   // Clears all items. Note that it does not free MenuModel of submenu.
@@ skipping 63 matching lines @@
   MenuModelDelegate* menu_model_delegate_;
 
   base::WeakPtrFactory<SimpleMenuModel> method_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SimpleMenuModel);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_MODELS_SIMPLE_MENU_MODEL_H_