Have Attr constructor take a Document / Element reference

Source/core/dom/Attr.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 24 matching lines @@
 class MutableStylePropertySet;
 
 // Attr can have Text children
 // therefore it has to be a fullblown Node. The plan
 // is to dynamically allocate a textchild and store the
 // resulting nodevalue in the attribute upon
 // destruction. however, this is not yet implemented.
 
 class Attr FINAL : public ContainerNode {
 public:
-    static PassRefPtr<Attr> create(Element*, const QualifiedName&);
-    static PassRefPtr<Attr> create(Document*, const QualifiedName&, const AtomicString& value);
+    static PassRefPtr<Attr> create(Element&, const QualifiedName&);
+    static PassRefPtr<Attr> create(Document&, const QualifiedName&, const AtomicString& value);
     virtual ~Attr();
 
     String name() const { return qualifiedName().toString(); }
     bool specified() const { return m_specified; }
     Element* ownerElement() const { return m_element; }
 
     const AtomicString& value() const;
     void setValue(const AtomicString&, ExceptionState&);
     void setValue(const AtomicString&);
 
     const QualifiedName& qualifiedName() const { return m_name; }
 
     bool isId() const;
 
     void setSpecified(bool specified) { m_specified = specified; }
 
     void attachToElement(Element*);
     void detachFromElementWithValue(const AtomicString&);
 
     virtual const AtomicString& localName() const OVERRIDE { return m_name.localName(); }
     virtual const AtomicString& namespaceURI() const OVERRIDE { return m_name.namespaceURI(); }
     virtual const AtomicString& prefix() const OVERRIDE { return m_name.prefix(); }
 
     virtual void setPrefix(const AtomicString&, ExceptionState&) OVERRIDE;
 
 private:
-    Attr(Element*, const QualifiedName&);
-    Attr(Document*, const QualifiedName&, const AtomicString& value);
+    Attr(Element&, const QualifiedName&);
+    Attr(Document&, const QualifiedName&, const AtomicString& value);
 
     void createTextChild();
 
     virtual String nodeName() const OVERRIDE { return name(); }
     virtual NodeType nodeType() const OVERRIDE { return ATTRIBUTE_NODE; }
 
     virtual String nodeValue() const OVERRIDE { return value(); }
     virtual void setNodeValue(const String&);
     virtual PassRefPtr<Node> cloneNode(bool deep = true);
 
@@ skipping 22 matching lines @@
 
 inline const Attr* toAttr(const Node* node)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isAttributeNode());
     return static_cast<const Attr*>(node);
 }
 
 } // namespace WebCore
 
 #endif // Attr_h