[Mac] Don't close the Wrench menu after using the zoom buttons if the menu was opened sticky.

chrome/browser/wrench_menu_model.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_WRENCH_MENU_MODEL_H_
 #define CHROME_BROWSER_WRENCH_MENU_MODEL_H_
 #pragma once
 
 #include "app/menus/button_menu_item_model.h"
 #include "app/menus/simple_menu_model.h"
@@ skipping 88 matching lines @@
   virtual void TabStripModelDeleted();
 
   // Overridden from NotificationObserver:
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
   // Getters.
   Browser* browser() const { return browser_; }
 
+  // Calculates |zoom_label_| in response to a zoom change.
+  void UpdateZoomControls();
+
  private:
   // Testing constructor used for mocking.
   friend class ::MockWrenchMenuModel;
   WrenchMenuModel() : menus::SimpleMenuModel(NULL) {}
 
   void Build();
 
   // Adds custom items to the menu. Deprecated in favor of a cross platform
   // model for button items.
   void CreateCutCopyPaste();
   void CreateZoomFullscreen();
 
-  // Calculates |zoom_label_| in response to a zoom change.
-  void UpdateZoomControls();
+  // Gets the current zoom information from the renderer.
   double GetZoom(bool* enable_increment, bool* enable_decrement);
 
   string16 GetSyncMenuLabel() const;
   string16 GetAboutEntryMenuLabel() const;
   bool IsDynamicItem(int index) const;
 
   // Models for the special menu items with buttons.
   scoped_ptr<menus::ButtonMenuItemModel> edit_menu_item_model_;
   scoped_ptr<menus::ButtonMenuItemModel> zoom_menu_item_model_;
 
   // Label of the zoom label in the zoom menu item.
   string16 zoom_label_;
 
   // Tools menu.
   scoped_ptr<ToolsMenuModel> tools_menu_model_;
 
   menus::SimpleMenuModel::Delegate* delegate_; // weak
 
   Browser* browser_;  // weak
   TabStripModel* tabstrip_model_; // weak
 
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(WrenchMenuModel);
 };
 
 #endif  // CHROME_BROWSER_WRENCH_MENU_MODEL_H_