alternate ntp: add "Recent Tabs" submenu to wrench menu

chrome/browser/ui/views/toolbar_view.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 CHROME_BROWSER_UI_VIEWS_TOOLBAR_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_VIEW_H_
 
 #include <set>
 #include <string>
 
@@ skipping 209 matching lines @@
 
   // Controls whether or not a home button should be shown on the toolbar.
   BooleanPrefMember show_home_button_;
 
   // A pref that counts how often the bubble has been shown.
   IntegerPrefMember sideload_wipeout_bubble_shown_;
 
   // The display mode used when laying out the toolbar.
   DisplayMode display_mode_;
 
-  // Wrench menu.
+  // Wrench model and menu.
+  // Note that the menu should be destroyed before the model it uses, so the
+  // menu should be listed later.
+  scoped_ptr<WrenchMenuModel> wrench_menu_model_;
   scoped_ptr<WrenchMenu> wrench_menu_;
-  scoped_ptr<WrenchMenuModel> wrench_menu_model_;
 
   // A list of listeners to call when the menu opens.
   ObserverList<views::MenuListener> menu_listeners_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ToolbarView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_VIEW_H_