Have Document::nodeWillBeRemoved() take a reference

Source/core/dom/NodeIterator.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2000 Frederik Holljen (frederik.holljen@hig.no)
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2008 Apple Inc. All rights reserved.
  *
  * 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 33 matching lines @@
     ~NodeIterator();
 
     PassRefPtr<Node> nextNode(ScriptState*, ExceptionState&);
     PassRefPtr<Node> previousNode(ScriptState*, ExceptionState&);
     void detach();
 
     Node* referenceNode() const { return m_referenceNode.node.get(); }
     bool pointerBeforeReferenceNode() const { return m_referenceNode.isPointerBeforeNode; }
 
     // This function is called before any node is removed from the document tree.
-    void nodeWillBeRemoved(Node*);
+    void nodeWillBeRemoved(Node&);
 
 private:
     NodeIterator(PassRefPtr<Node>, unsigned whatToShow, PassRefPtr<NodeFilter>);
 
     struct NodePointer {
         RefPtr<Node> node;
         bool isPointerBeforeNode;
         NodePointer();
         NodePointer(PassRefPtr<Node>, bool);
         void clear();
         bool moveToNext(Node* root);
         bool moveToPrevious(Node* root);
     };
 
-    void updateForNodeRemoval(Node* nodeToBeRemoved, NodePointer&) const;
+    void updateForNodeRemoval(Node& nodeToBeRemoved, NodePointer&) const;
 
     NodePointer m_referenceNode;
     NodePointer m_candidateNode;
     bool m_detached;
 };
 
 } // namespace WebCore
 
 #endif // NodeIterator_h