Delete some unused code found by the clang static analyzer.

chrome/browser/ui/cocoa/menu_button.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_COCOA_MENU_BUTTON_H_
 #define CHROME_BROWSER_UI_COCOA_MENU_BUTTON_H_
 #pragma once
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/toolbar/toolbar_button.h"
 
 // This a button which displays a user-provided menu "attached" below it upon
 // being clicked or dragged (or clicked and held). It expects a
 // |ClickHoldButtonCell| as cell.
 //
 // There are two different behaviors of this button depending on the value of
 // the |openMenuOnClick| property. If YES, the target-action mechanism will be
 // handled internally to always show the menu when clicked. This behavior is
 // used for the Wrench menu, for example. When the property is NO, the button
 // can have a separate target-action but will open the menu when clicked and
 // held. This is used for the toolbar back/forward buttons, which have a
 // primary action and the menu as a secondary click-hold action. The default
 // value is NO so that custom actions can be hooked up in Interface Builder.
 @interface MenuButton : ToolbarButton {
  @private
   scoped_nsobject<NSMenu> attachedMenu_;
-  BOOL attachedMenuEnabled_;
   BOOL openMenuOnClick_;
   BOOL openMenuOnRightClick_;
   scoped_nsobject<NSPopUpButtonCell> popUpCell_;
 }
 
 // The menu to display. Note that it should have no (i.e., a blank) title and
 // that the 0-th entry should be blank (and won't be displayed). (This is
 // because we use a pulldown list, for which Cocoa uses the 0-th item as "title"
 // in the button. This might change if we ever switch to a pop-up. Our direct
 // use of the given NSMenu object means that the one can set and use NSMenu's
@@ skipping 12 matching lines @@
 - (NSRect)menuRect;
 
 @end  // @interface MenuButton
 
 // Available for subclasses.
 @interface MenuButton (Protected)
 - (void)configureCell;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_MENU_BUTTON_H_