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

Source/core/css/StylePropertySet.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Research In Motion Limited. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 120 matching lines @@
         if (propertyAt(i).id() == CSSPropertyVariable)
             count++;
     }
     return count;
 }
 
 String StylePropertySet::variableValue(const AtomicString& name) const
 {
     ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled());
     size_t index = findVariableIndex(name);
-    if (index == notFound)
+    if (index == kNotFound)
         return String();
     return toCSSVariableValue(propertyAt(index).value())->value();
 }
 
 bool MutableStylePropertySet::removeShorthandProperty(CSSPropertyID propertyID)
 {
     StylePropertyShorthand shorthand = shorthandForProperty(propertyID);
     if (!shorthand.length())
         return false;
 
@@ skipping 125 matching lines @@
     return indexOfShorthandForLonghand(prefixedShorthand, matchingShorthandsForLonghand(prefixingVariant));
 }
 
 bool MutableStylePropertySet::setVariableValue(const AtomicString& name, const String& value, bool important)
 {
     ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled());
     if (value.isEmpty())
         return removeVariable(name);
 
     size_t index = findVariableIndex(name);
-    if (index != notFound) {
+    if (index != kNotFound) {
         CSSValue* cssValue = m_propertyVector.at(index).value();
         if (toCSSVariableValue(cssValue)->value() == value)
             return false;
     }
 
     CSSProperty property(CSSPropertyVariable, CSSVariableValue::create(name, value), important);
-    if (index == notFound)
+    if (index == kNotFound)
         m_propertyVector.append(property);
     else
         m_propertyVector.at(index) = property;
     return true;
 }
 
 void MutableStylePropertySet::appendPrefixingVariantProperty(const CSSProperty& property)
 {
     m_propertyVector.append(property);
     CSSPropertyID prefixingVariant = prefixingVariantForPropertyId(property.id());
@@ skipping 186 matching lines @@
 }
 
 size_t StylePropertySet::findVariableIndex(const AtomicString& name) const
 {
     ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled());
     for (int i = propertyCount() - 1; i >= 0; --i) {
         const PropertyReference& property = propertyAt(i);
         if (property.id() == CSSPropertyVariable && toCSSVariableValue(property.value())->name() == name)
             return i;
     }
-    return notFound;
+    return kNotFound;
 }
 
 CSSProperty* MutableStylePropertySet::findCSSPropertyWithID(CSSPropertyID propertyID)
 {
     int foundPropertyIndex = findPropertyIndex(propertyID);
     if (foundPropertyIndex == -1)
         return 0;
     return &m_propertyVector.at(foundPropertyIndex);
 }
 
@@ skipping 30 matching lines @@
     }
     // FIXME: This should use mass removal.
     for (unsigned i = 0; i < propertiesToRemove.size(); ++i)
         removeProperty(propertiesToRemove[i]);
 }
 
 bool MutableStylePropertySet::removeVariable(const AtomicString& name)
 {
     ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled());
     size_t index = findVariableIndex(name);
-    if (index == notFound)
+    if (index == kNotFound)
         return false;
     m_propertyVector.remove(index);
     return true;
 }
 
 bool MutableStylePropertySet::clearVariables()
 {
     ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled());
     CSSPropertyID variablesId = CSSPropertyVariable;
     return removePropertiesInSet(&variablesId, 1);
@@ skipping 88 matching lines @@
     result.appendLiteral(": ");
     result.append(propertyValue()->cssText());
     if (isImportant())
         result.appendLiteral(" !important");
     result.append(';');
     return result.toString();
 }
 
 
 } // namespace WebCore