Revert of Don't keep recreating AXMenuListPopup

Source/modules/accessibility/AXMenuListPopup.h

 /*
  * Copyright (C) 2010 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 39 matching lines @@
     explicit AXMenuListPopup(AXObjectCacheImpl*);
 
     virtual bool isMenuListPopup() const override { return true; }
 
     virtual LayoutRect elementRect() const override { return LayoutRect(); }
     virtual AccessibilityRole roleValue() const override { return MenuListPopupRole; }
 
     virtual bool isVisible() const override;
     virtual bool press() const override;
     virtual void addChildren() override;
-    virtual void updateChildrenIfNecessary() override;
+    virtual void childrenChanged() override;
     virtual bool computeAccessibilityIsIgnored() const override;
 
     AXMenuListOption* menuListOptionAXObject(HTMLElement*) const;
     int getSelectedIndex() const;
 
     // Note that this may be -1 if nothing is selected.
     int m_activeIndex;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXMenuListPopup, isMenuListPopup());
 
 } // namespace blink
 
 #endif // AXMenuListPopup_h