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

Source/core/dom/CustomElement.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 46 matching lines @@
 
 static CustomElement::NameSet enabledNameSet()
 {
     return CustomElement::NameSet((RuntimeEnabledFeatures::customElementsEnabled() ? CustomElement::StandardNames : 0) | (RuntimeEnabledFeatures::embedderCustomElementsEnabled() ? CustomElement::EmbedderNames : 0));
 }
 
 bool CustomElement::isValidName(const AtomicString& name, NameSet validNames)
 {
     validNames = NameSet(validNames & enabledNameSet());
 
-    if ((validNames & EmbedderNames) && notFound != embedderCustomElementNames().find(name))
+    if ((validNames & EmbedderNames) && kNotFound != embedderCustomElementNames().find(name))
         return Document::isValidName(name);
 
-    if ((validNames & StandardNames) && notFound != name.find('-')) {
+    if ((validNames & StandardNames) && kNotFound != name.find('-')) {
         DEFINE_STATIC_LOCAL(Vector<AtomicString>, reservedNames, ());
         if (reservedNames.isEmpty()) {
             reservedNames.append(MathMLNames::annotation_xmlTag.localName());
             reservedNames.append(SVGNames::color_profileTag.localName());
             reservedNames.append(SVGNames::font_faceTag.localName());
             reservedNames.append(SVGNames::font_face_srcTag.localName());
             reservedNames.append(SVGNames::font_face_uriTag.localName());
             reservedNames.append(SVGNames::font_face_formatTag.localName());
             reservedNames.append(SVGNames::font_face_nameTag.localName());
             reservedNames.append(SVGNames::missing_glyphTag.localName());
         }
 
-        if (notFound == reservedNames.find(name))
+        if (kNotFound == reservedNames.find(name))
             return Document::isValidName(name.string());
     }
 
     return false;
 }
 
 void CustomElement::define(Element* element, PassRefPtr<CustomElementDefinition> passDefinition)
 {
     RefPtr<CustomElementDefinition> definition(passDefinition);
 
@@ skipping 77 matching lines @@
     ASSERT(result.isNewEntry);
 }
 
 CustomElement::DefinitionMap& CustomElement::definitions()
 {
     DEFINE_STATIC_LOCAL(DefinitionMap, map, ());
     return map;
 }
 
 } // namespace WebCore