Add MenuItemView API to add and remove items at a particular index.

views/controls/menu/menu_item_view.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 VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_
 #define VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_
 #pragma once
 
 #include <string>
+#include <vector>
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 // TODO(avi): remove when not needed
 #include "base/utf_string_conversions.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "views/view.h"
 
@@ skipping 100 matching lines @@
                  const gfx::Rect& bounds,
                  AnchorPosition anchor,
                  bool has_mnemonics);
   void RunMenuForDropAt(gfx::NativeWindow parent,
                         const gfx::Rect& bounds,
                         AnchorPosition anchor);
 
   // Hides and cancels the menu. This does nothing if the menu is not open.
   void Cancel();
 
-  // Adds an item to this menu.
+  // Add an item to the menu at a specified index.  ChildrenChanged() should
+  // called after adding menu items if the menu may be active.
+  MenuItemView* AddMenuItemAt(int index,
+                              int item_id,
+                              const std::wstring& label,
+                              const SkBitmap& icon,
+                              Type type);
+
+  // Remove an item from the menu at a specified index.
+  // ChildrenChanged() should be called after removing menu items (whether
+  // the menu may be active or not).
+  void RemoveMenuItemAt(int index);
+
+  // Appends an item to this menu.
   // item_id    The id of the item, used to identify it in delegate callbacks
   //            or (if delegate is NULL) to identify the command associated
   //            with this item with the controller specified in the ctor. Note
   //            that this value should not be 0 as this has a special meaning
   //            ("NULL command, no item selected")
   // label      The text label shown.
   // type       The type of item.
   void AppendMenuItem(int item_id,
                       const std::wstring& label,
                       Type type) {
@@ skipping 275 matching lines @@
   // Margins between the right of the item and the label.
   static int item_right_margin_;
 
   // Preferred height of menu items. Reset every time a menu is run.
   static int pref_menu_height_;
 
   // Previously calculated preferred size to reduce GetStringWidth calls in
   // GetPreferredSize.
   gfx::Size pref_size_;
 
+  // Removed items to be deleted in ChildrenChanged().
+  std::vector<View*> removed_items_;
+
   DISALLOW_COPY_AND_ASSIGN(MenuItemView);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_