Views: Rebuild wrench menu if error is added or removed

chrome/browser/ui/views/wrench_menu.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_UI_VIEWS_WRENCH_MENU_H_
 #define CHROME_BROWSER_UI_VIEWS_WRENCH_MENU_H_
 #pragma once
 
 #include <map>
 #include <utility>
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/bookmarks/base_bookmark_model_observer.h"
+#include "content/common/notification_observer.h"
+#include "content/common/notification_registrar.h"
 #include "ui/base/models/menu_model.h"
 #include "views/controls/menu/menu_delegate.h"
 
 class BookmarkMenuDelegate;
 class Browser;
 
 namespace views {
 class MenuButton;
 class MenuItemView;
 class MenuRunner;
 class View;
 }  // namespace views
 
 // WrenchMenu adapts the WrenchMenuModel to view's menu related classes.
 class WrenchMenu : public views::MenuDelegate,
-                   public BaseBookmarkModelObserver {
+                   public BaseBookmarkModelObserver,
+                   public NotificationObserver {
  public:
   explicit WrenchMenu(Browser* browser);
   virtual ~WrenchMenu();
 
   void Init(ui::MenuModel* model);
 
   // Shows the menu relative to the specified view.
   void RunMenu(views::MenuButton* host);
 
   // MenuDelegate overrides:
@@ skipping 24 matching lines @@
   virtual int GetMaxWidthForMenu(views::MenuItemView* menu) OVERRIDE;
   virtual bool IsItemChecked(int id) const OVERRIDE;
   virtual bool IsCommandEnabled(int id) const OVERRIDE;
   virtual void ExecuteCommand(int id, int mouse_event_flags) OVERRIDE;
   virtual bool GetAccelerator(int id, views::Accelerator* accelerator) OVERRIDE;
   virtual void WillShowMenu(views::MenuItemView* menu) OVERRIDE;
 
   // BaseBookmarkModelObserver overrides:
   virtual void BookmarkModelChanged() OVERRIDE;
 
+  // NotificationObserver overrides:
+  virtual void Observe(int type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details) OVERRIDE;
+
  private:
   class CutCopyPasteView;
   class ZoomView;
 
   typedef std::pair<ui::MenuModel*,int> Entry;
   typedef std::map<int,Entry> IDToEntry;
 
   // Populates |parent| with all the child menus in |model|. Recursively invokes
   // |PopulateMenu| for any submenu. |next_id| is incremented for every menu
   // that is created.
@@ skipping 43 matching lines @@
 
   // Used for managing the bookmark menu items.
   scoped_ptr<BookmarkMenuDelegate> bookmark_menu_delegate_;
 
   // Menu corresponding to IDC_BOOKMARKS_MENU.
   views::MenuItemView* bookmark_menu_;
 
   // ID to use for the items representing bookmarks in the bookmark menu.
   int first_bookmark_command_id_;
 
+  NotificationRegistrar registrar_;
+
   DISALLOW_COPY_AND_ASSIGN(WrenchMenu);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_WRENCH_MENU_H_