[oilpan] Handlify childrenChanged.

Source/core/html/HTMLFieldSetElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 47 matching lines @@
     }
 }
 
 void HTMLFieldSetElement::disabledAttributeChanged()
 {
     // This element must be updated before the style of nodes in its subtree gets recalculated.
     HTMLFormControlElement::disabledAttributeChanged();
     invalidateDisabledStateUnder(this);
 }
 
-void HTMLFieldSetElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
+void HTMLFieldSetElement::childrenChanged(bool changedByParser, const Handle<Node>& beforeChange, const Handle<Node>& afterChange, int childCountDelta)
 {
     HTMLFormControlElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
     for (Element* element = ElementTraversal::firstWithin(this); element; element = ElementTraversal::nextSkippingChildren(element, this)) {
         if (element->hasTagName(legendTag))
             invalidateDisabledStateUnder(element);
     }
 }
 
 bool HTMLFieldSetElement::supportsFocus() const
 {
@@ skipping 63 matching lines @@
             ++len;
     return len;
 }
 
 void HTMLFieldSetElement::accept(Visitor* visitor) const
 {
     HTMLFormControlElement::accept(visitor);
 }
 
 } // namespace