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

Source/core/accessibility/AccessibilityScrollView.cpp

 /*
  * Copyright (C) 2011 Apple 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 99 matching lines @@
         m_verticalScrollbar = addChildScrollbar(m_scrollView->verticalScrollbar());
     else if (!m_scrollView->verticalScrollbar() && m_verticalScrollbar) {
         removeChildScrollbar(m_verticalScrollbar.get());
         m_verticalScrollbar = 0;
     }
 }
 
 void AccessibilityScrollView::removeChildScrollbar(AccessibilityObject* scrollbar)
 {
     size_t pos = m_children.find(scrollbar);
-    if (pos != WTF::notFound) {
+    if (pos != kNotFound) {
         m_children[pos]->detachFromParent();
         m_children.remove(pos);
     }
 }
 
 AccessibilityScrollbar* AccessibilityScrollView::addChildScrollbar(Scrollbar* scrollbar)
 {
     if (!scrollbar)
         return 0;
 
@@ skipping 102 matching lines @@
     return m_scrollView;
 }
 
 void AccessibilityScrollView::scrollTo(const IntPoint& point) const
 {
     if (m_scrollView)
         m_scrollView->setScrollPosition(point);
 }
 
 } // namespace WebCore