Remove Node.prefix so it's no longer visible to script.

Source/core/dom/Node.h

 /*
  * 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, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.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 188 matching lines @@
     void insertBefore(PassRefPtr<Node> newChild, Node* refChild, ExceptionState& = ASSERT_NO_EXCEPTION);
     void replaceChild(PassRefPtr<Node> newChild, Node* oldChild, ExceptionState& = ASSERT_NO_EXCEPTION);
     void removeChild(Node* child, ExceptionState&);
     void appendChild(PassRefPtr<Node> newChild, ExceptionState& = ASSERT_NO_EXCEPTION);
 
     bool hasChildNodes() const { return firstChild(); }
     virtual PassRefPtr<Node> cloneNode(bool deep = false) = 0;
     virtual const AtomicString& localName() const;
     virtual const AtomicString& namespaceURI() const;
     virtual const AtomicString& prefix() const;
-    virtual void setPrefix(const AtomicString&, ExceptionState&);
     void normalize();
 
     bool isSameNode(Node* other) const { return this == other; }
     bool isEqualNode(Node*) const;
     bool isDefaultNamespace(const AtomicString& namespaceURI) const;
     const AtomicString& lookupPrefix(const AtomicString& namespaceURI) const;
     const AtomicString& lookupNamespaceURI(const String& prefix) const;
     const AtomicString& lookupNamespacePrefix(const AtomicString& namespaceURI, const Element* originalElement) const;
 
     String textContent(bool convertBRsToNewlines = false) const;
@@ skipping 258 matching lines @@
         return getFlag(InDocumentFlag);
     }
     bool isInShadowTree() const { return getFlag(IsInShadowTreeFlag); }
     bool isInTreeScope() const { return getFlag(static_cast<NodeFlags>(InDocumentFlag | IsInShadowTreeFlag)); }
 
     bool isDocumentTypeNode() const { return nodeType() == DOCUMENT_TYPE_NODE; }
     virtual bool childTypeAllowed(NodeType) const { return false; }
     unsigned childNodeCount() const;
     Node* childNode(unsigned index) const;
 
-    void checkSetPrefix(const AtomicString& prefix, ExceptionState&);
     bool isDescendantOf(const Node*) const;
     bool contains(const Node*) const;
     bool containsIncludingShadowDOM(const Node*) const;
     bool containsIncludingHostElements(const Node&) const;
     Node* commonAncestor(const Node&, Node* (*parent)(const Node&));
 
     // FIXME: Remove this when crbug.com/265716 cleans up contains semantics.
     bool bindingsContains(const Node* node) const { return containsIncludingShadowDOM(node); }
 
     // Used to determine whether range offsets use characters or node indices.
@@ skipping 297 matching lines @@
     // isTreeScopeInitialized() can be false
     // - in the destruction of Document or ShadowRoot where m_treeScope is set to null or
     // - in the Node constructor called by these two classes where m_treeScope is set by TreeScope ctor.
     bool isTreeScopeInitialized() const { return m_treeScope; }
 
     void markAncestorsWithChildNeedsStyleRecalc();
 
     bool isParsingChildrenFinished() const { return getFlag(IsParsingChildrenFinishedFlag); }
     void setIsParsingChildrenFinished(bool value) { setFlag(value, IsParsingChildrenFinishedFlag); }
 
+    void checkSetPrefix(const AtomicString& prefix, ExceptionState&);
+
 private:
     friend class TreeShared<Node>;
 
     virtual PseudoId customPseudoId() const
     {
         ASSERT(hasCustomStyleCallbacks());
         return NOPSEUDO;
     }
 
     void removedLastRef();
@@ skipping 106 matching lines @@
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const WebCore::Node*);
 void showNodePath(const WebCore::Node*);
 #endif
 
 #endif