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

Source/core/rendering/RenderTableCell.cpp

Index: Source/core/rendering/RenderTableCell.cpp
diff --git a/Source/core/rendering/RenderTableCell.cpp b/Source/core/rendering/RenderTableCell.cpp
index 9e00d983125b27d1c383dca3b74000ab699993cf..0364df0608e703a4162f9f34e5db8084a19d9279 100644
--- a/Source/core/rendering/RenderTableCell.cpp
+++ b/Source/core/rendering/RenderTableCell.cpp
@@ -153,7 +153,7 @@ void RenderTableCell::computePreferredLogicalWidths()
     if (node() && style()->autoWrap()) {
         // See if nowrap was set.
         Length w = styleOrColLogicalWidth();
-        String nowrap = toElement(node())->getAttribute(nowrapAttr);
+        const AtomicString& nowrap = toElement(node())->getAttribute(nowrapAttr);
         if (!nowrap.isNull() && w.isFixed())
             // Nowrap is set, but we didn't actually use it because of the
             // fixed width set on the cell.  Even so, it is a WinIE/Moz trait