[Mac] Insert the Update Chrome item to existing Wrench menus when notified.

chrome/browser/cocoa/wrench_menu_controller.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 CHROME_BROWSER_COCOA_WRENCH_MENU_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_WRENCH_MENU_CONTROLLER_H_
 #pragma once
 
 #import <Cocoa/Cocoa.h>
 
@@ skipping 30 matching lines @@
 
 // Used to dispatch commands from the Wrench menu. The custom items within the
 // menu cannot be hooked up directly to First Responder because the window in
 // which the controls reside is not the BrowserWindowController, but a
 // NSCarbonMenuWindow; this screws up the typical |-commandDispatch:| system.
 - (IBAction)dispatchWrenchMenuCommand:(id)sender;
 
 // Returns the weak reference to the WrenchMenuModel.
 - (WrenchMenuModel*)wrenchMenuModel;
 
+// Inserts the update available notification menu item.
+- (void)insertUpdateAvailableItem;
+
 @end
 
 ////////////////////////////////////////////////////////////////////////////////
 
 @interface WrenchMenuController (UnitTesting)
 // |-dispatchWrenchMenuCommand:| calls this after it has determined the tag of
 // the sender. The default implementation executes the command on the outermost
 // run loop using |-performSelector...withDelay:|. This is not desirable in
 // unit tests because it's hard to test around run loops in a deterministic
 // manner. To avoid those headaches, tests should provide an alternative
 // implementation.
 - (void)dispatchCommandInternal:(NSInteger)tag;
 @end
 
 #endif  // CHROME_BROWSER_COCOA_WRENCH_MENU_CONTROLLER_H_