Change SimpleMenuModel on OSX to support dynamic icons

app/menus/menu_model.h

 // Copyright (c) 2010 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 APP_MENUS_MENU_MODEL_H_
 #define APP_MENUS_MENU_MODEL_H_
 #pragma once
 
 #include "base/scoped_ptr.h"
 #include "base/string16.h"
@@ skipping 45 matching lines @@
 
   // Returns the type of item at the specified index.
   virtual ItemType GetTypeAt(int index) const = 0;
 
   // Returns the command id of the item at the specified index.
   virtual int GetCommandIdAt(int index) const = 0;
 
   // Returns the label of the item at the specified index.
   virtual string16 GetLabelAt(int index) const = 0;
 
-  // Returns true if the label at the specified index can change over the course
-  // of the menu's lifetime. If this function returns true, the label of the
-  // menu item will be updated each time the menu is shown.
-  virtual bool IsLabelDynamicAt(int index) const = 0;
+  // Returns true if the menu item (label/icon) at the specified index can
+  // change over the course of the menu's lifetime. If this function returns
+  // true, the label and icon of the menu item will be updated each time the
+  // menu is shown.
+  virtual bool IsItemDynamicAt(int index) const = 0;
 
   // Returns the font use for the label at the specified index.
   // If NULL, then use default font.
   virtual const gfx::Font* GetLabelFontAt(int index) const;
 
   // Gets the acclerator information for the specified index, returning true if
   // there is a shortcut accelerator for the item, false otherwise.
   virtual bool GetAcceleratorAt(int index,
                                 menus::Accelerator* accelerator) const = 0;
 
@@ skipping 37 matching lines @@
   // Retrieves the model and index that contains a specific command id. Returns
   // true if an item with the specified command id is found. |model| is inout,
   // and specifies the model to start searching from.
   static bool GetModelAndIndexForCommandId(int command_id, MenuModel** model,
                                            int* index);
 };
 
 }  // namespace
 
 #endif  // APP_MENUS_MENU_MODEL_H_