Make sure getAttribute() / setAttribute() callers use AtomicStrings

Source/core/html/HTMLTableCellElement.cpp

 /*
  * 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, 2010 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 112 matching lines @@
     if (HTMLTableElement* table = findParentTable())
         return table->additionalCellStyle();
     return 0;
 }
 
 bool HTMLTableCellElement::isURLAttribute(const Attribute& attribute) const
 {
     return attribute.name() == backgroundAttr || HTMLTablePartElement::isURLAttribute(attribute);
 }
 
-String HTMLTableCellElement::abbr() const
+const AtomicString& HTMLTableCellElement::abbr() const
 {
     return getAttribute(abbrAttr);
 }
 
-String HTMLTableCellElement::axis() const
+const AtomicString& HTMLTableCellElement::axis() const
 {
     return getAttribute(axisAttr);
 }
 
 void HTMLTableCellElement::setColSpan(int n)
 {
     setIntegralAttribute(colspanAttr, n);
 }
 
-String HTMLTableCellElement::headers() const
+const AtomicString& HTMLTableCellElement::headers() const
 {
     return getAttribute(headersAttr);
 }
 
 void HTMLTableCellElement::setRowSpan(int n)
 {
     setIntegralAttribute(rowspanAttr, n);
 }
 
-String HTMLTableCellElement::scope() const
+const AtomicString& HTMLTableCellElement::scope() const
 {
     return getAttribute(scopeAttr);
 }
 
 void HTMLTableCellElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
 {
     HTMLTablePartElement::addSubresourceAttributeURLs(urls);
 
     addSubresourceURL(urls, document().completeURL(getAttribute(backgroundAttr)));
 }
 
 HTMLTableCellElement* HTMLTableCellElement::cellAbove() const
 {
     RenderObject* cellRenderer = renderer();
     if (!cellRenderer)
         return 0;
     if (!cellRenderer->isTableCell())
         return 0;
 
     RenderTableCell* tableCellRenderer = toRenderTableCell(cellRenderer);
     RenderTableCell* cellAboveRenderer = tableCellRenderer->table()->cellAbove(tableCellRenderer);
     if (!cellAboveRenderer)
         return 0;
 
     return toHTMLTableCellElement(cellAboveRenderer->node());
 }
 
 } // namespace WebCore