Contributed by Eriq Augustine <eriq.augustine@gmail.com>

chrome/browser/extensions/extension_menu_manager.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_MENU_MANAGER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_MENU_MANAGER_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 221 matching lines @@
   // item or a child of some other item), returning true if the item was found
   // and removed or false otherwise.
   bool RemoveContextMenuItem(const ExtensionMenuItem::Id& id);
 
   // Removes all items for the given extension id.
   void RemoveAllContextItems(const std::string& extension_id);
 
   // Returns the item with the given |id| or NULL.
   ExtensionMenuItem* GetItemById(const ExtensionMenuItem::Id& id) const;
 
+  // Notify the ExtensionMenuManager that an item has been updated not through
+  // an explicit call into ExtensionMenuManager. For example, if an item is
+  // acquired by a call to GetItemById and changed, then this should be called.
+  // Returns true if the item was found or false otherwise.
+  bool ItemUpdated(const ExtensionMenuItem::Id& id);
+
   // Called when a menu item is clicked on by the user.
   void ExecuteCommand(Profile* profile, content::WebContents* web_contents,
                       const ContextMenuParams& params,
                       const ExtensionMenuItem::Id& menuItemId);
 
   // This returns a bitmap of width/height kFaviconSize, loaded either from an
   // entry specified in the extension's 'icon' section of the manifest, or a
   // default extension icon.
   const SkBitmap& GetIconForExtension(const std::string& extension_id);
 
   // Implements the content::NotificationObserver interface.
   virtual void Observe(int type, const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ExtensionMenuManagerTest, DeleteParent);
   FRIEND_TEST_ALL_PREFIXES(ExtensionMenuManagerTest, RemoveOneByOne);
 
   // This is a helper function which takes care of de-selecting any other radio
   // items in the same group (i.e. that are adjacent in the list).
   void RadioItemSelected(ExtensionMenuItem* item);
 
+  // Make sure that there is only one radio item selected at once in any run.
+  // If there are no radio items selected, then the first item in the run
+  // will get selected. If there are multiple radio items selected, then only
+  // the last one will get selcted.
+  void SanitizeRadioList(const ExtensionMenuItem::List& item_list);

[asargent_no_longer_on_chrome, 2012/01/06 21:17:42]

Since you potentially modify some of |item_list|'s members by calling SetChecked
on them, you should pass a "ExtensionMenuItem::List*" instead of "const
ExtensionMenuItem::List&" to indicate to callers that this method modifies its
contents.

+
   // Returns true if item is a descendant of an item with id |ancestor_id|.
   bool DescendantOf(ExtensionMenuItem* item,
                     const ExtensionMenuItem::Id& ancestor_id);
 
   // We keep items organized by mapping an extension id to a list of items.
   typedef std::map<std::string, ExtensionMenuItem::List> MenuItemMap;
   MenuItemMap context_items_;
 
   // This lets us make lookup by id fast. It maps id to ExtensionMenuItem* for
   // all items the menu manager knows about, including all children of top-level
   // items.
   std::map<ExtensionMenuItem::Id, ExtensionMenuItem*> items_by_id_;
 
   content::NotificationRegistrar registrar_;
 
   ExtensionIconManager icon_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionMenuManager);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_MENU_MANAGER_H_