WTF::notFound looks too much like a local variable.

Source/core/css/SelectorChecker.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 304 matching lines @@
         break;
     case CSSSelector::List:
         {
             // Ignore empty selectors or selectors containing HTML spaces
             if (selectorValue.isEmpty() || containsHTMLSpace(selectorValue))
                 return false;
 
             unsigned startSearchAt = 0;
             while (true) {
                 size_t foundPos = value.find(selectorValue, startSearchAt, caseSensitive);
-                if (foundPos == notFound)
+                if (foundPos == kNotFound)
                     return false;
                 if (!foundPos || isHTMLSpace(value[foundPos - 1])) {
                     unsigned endStr = foundPos + selectorValue.length();
                     if (endStr == value.length() || isHTMLSpace(value[endStr]))
                         break; // We found a match.
                 }
 
                 // No match. Keep looking.
                 startSearchAt = foundPos + 1;
             }
@@ skipping 649 matching lines @@
     return element->focused() && isFrameFocused(element);
 }
 
 template
 SelectorChecker::Match SelectorChecker::match(const SelectorCheckingContext&, PseudoId&, const DOMSiblingTraversalStrategy&) const;
 
 template
 SelectorChecker::Match SelectorChecker::match(const SelectorCheckingContext&, PseudoId&, const ShadowDOMSiblingTraversalStrategy&) const;
 
 }