Replace elementHasLegalLinkAttribute() helper with virtual function

Source/core/html/HTMLTableElement.h

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 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
@@ skipping 57 matching lines @@
     const StylePropertySet* additionalCellStyle();
     const StylePropertySet* additionalGroupStyle(bool rows);
 
 private:
     explicit HTMLTableElement(Document&);
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual bool isPresentationAttribute(const QualifiedName&) const OVERRIDE;
     virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) OVERRIDE;
     virtual bool isURLAttribute(const Attribute&) const OVERRIDE;
+    virtual bool hasLegalLinkAttribute(const QualifiedName&) const OVERRIDE;
 
     // Used to obtain either a solid or outset border decl and to deal with the frame and rules attributes.
     virtual const StylePropertySet* additionalPresentationAttributeStyle() OVERRIDE;
 
     enum TableRules { UnsetRules, NoneRules, GroupsRules, RowsRules, ColsRules, AllRules };
     enum CellBorders { NoBorders, SolidBorders, InsetBorders, SolidBordersColsOnly, SolidBordersRowsOnly };
 
     CellBorders cellBorders() const;
 
     PassRefPtr<StylePropertySet> createSharedCellStyle();
 
     HTMLTableSectionElement* lastBody() const;
 
     void setNeedsTableStyleRecalc() const;
 
     bool m_borderAttr;          // Sets a precise border width and creates an outset border for the table and for its cells.
     bool m_borderColorAttr;     // Overrides the outset border and makes it solid for the table and cells instead.
     bool m_frameAttr;           // Implies a thin border width if no border is set and then a certain set of solid/hidden borders based off the value.
     TableRules m_rulesAttr;     // Implies a thin border width, a collapsing border model, and all borders on the table becoming set to hidden (if frame/border
                                 // are present, to none otherwise).
 
     unsigned short m_padding;
     RefPtr<StylePropertySet> m_sharedCellStyle;
 };
 
 } //namespace
 
 #endif