Mac: Fix crash when clicking on zombie translate options menu

chrome/browser/ui/cocoa/infobar_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.
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/cocoa_protocols.h"
 #include "base/scoped_nsobject.h"
 
 @class AnimatableView;
@@ skipping 52 matching lines @@
 
 // Close or animate close the infobar.
 - (void)close;
 - (void)animateClosed;
 
 // Subclasses can override this method to add additional controls to
 // the infobar view.  This method is called by awakeFromNib.  The
 // default implementation does nothing.
 - (void)addAdditionalControls;
 
+// Subclasses must override this method to perform cleanup just before the
+// infobar closes.
+- (void)infobarWillClose;
+
 // Sets the info bar message to the specified |message|.
 - (void)setLabelToMessage:(NSString*)message;
 
 // Removes the OK and Cancel buttons and resizes the textfield to use the
 // space.
 - (void)removeButtons;
 
 @property(nonatomic, assign) id<InfoBarContainer> containerController;
 @property(nonatomic, readonly) InfoBarDelegate* delegate;
 
@@ skipping 14 matching lines @@
 @end
 
 
 @interface ConfirmInfoBarController : InfoBarController
 // Called when the OK and Cancel buttons are clicked.
 - (IBAction)ok:(id)sender;
 - (IBAction)cancel:(id)sender;
 // Called when there is a click on the link in the infobar.
 - (void)linkClicked;
 @end