Let NamedNodeMap take and return Attr instead of Node

Source/core/dom/NamedNodeMap.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, 2008, 2010, 2013 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 15 matching lines @@
 #define NamedNodeMap_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/Element.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
-class Node;
+class Attr;
 class ExceptionState;
 
 class NamedNodeMap final : public NoBaseWillBeGarbageCollected<NamedNodeMap>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
     friend class Element;
 public:
     static PassOwnPtrWillBeRawPtr<NamedNodeMap> create(Element* element)
     {
         return adoptPtrWillBeNoop(new NamedNodeMap(element));
     }
 
 #if !ENABLE(OILPAN)
     void ref();
     void deref();
 #endif
 
     // Public DOM interface.
 
-    PassRefPtrWillBeRawPtr<Node> getNamedItem(const AtomicString&) const;
-    PassRefPtrWillBeRawPtr<Node> removeNamedItem(const AtomicString& name, ExceptionState&);
+    PassRefPtrWillBeRawPtr<Attr> getNamedItem(const AtomicString&) const;
+    PassRefPtrWillBeRawPtr<Attr> removeNamedItem(const AtomicString& name, ExceptionState&);
 
-    PassRefPtrWillBeRawPtr<Node> getNamedItemNS(const AtomicString& namespaceURI, const AtomicString& localName) const;
-    PassRefPtrWillBeRawPtr<Node> removeNamedItemNS(const AtomicString& namespaceURI, const AtomicString& localName, ExceptionState&);
+    PassRefPtrWillBeRawPtr<Attr> getNamedItemNS(const AtomicString& namespaceURI, const AtomicString& localName) const;
+    PassRefPtrWillBeRawPtr<Attr> removeNamedItemNS(const AtomicString& namespaceURI, const AtomicString& localName, ExceptionState&);
 
-    PassRefPtrWillBeRawPtr<Node> setNamedItem(Node*, ExceptionState&);
-    PassRefPtrWillBeRawPtr<Node> setNamedItemNS(Node*, ExceptionState&);
+    PassRefPtrWillBeRawPtr<Attr> setNamedItem(Attr*, ExceptionState&);
+    PassRefPtrWillBeRawPtr<Attr> setNamedItemNS(Attr*, ExceptionState&);
 
-    PassRefPtrWillBeRawPtr<Node> item(unsigned index) const;
+    PassRefPtrWillBeRawPtr<Attr> item(unsigned index) const;
     size_t length() const;
 
     Element* element() const { return m_element; }
 
     void trace(Visitor*);
 
 private:
     explicit NamedNodeMap(Element* element)
         : m_element(element)
     {
         // Only supports NamedNodeMaps with Element associated.
         ASSERT(m_element);
     }
 
     RawPtrWillBeMember<Element> m_element;
 };
 
 } // namespace blink
 
 #endif // NamedNodeMap_h