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

Source/core/dom/shadow/ContentDistribution.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 31 matching lines @@
     ASSERT(!isActiveInsertionPoint(node.get()));
     size_t size = m_nodes.size();
     m_indices.set(node.get(), size);
     m_nodes.append(node);
 }
 
 size_t ContentDistribution::find(const Node* node) const
 {
     HashMap<const Node*, size_t>::const_iterator it = m_indices.find(node);
     if (it == m_indices.end())
-        return notFound;
+        return kNotFound;
 
     return it.get()->value;
 }
 
 Node* ContentDistribution::nextTo(const Node* node) const
 {
     size_t index = find(node);
-    if (index == notFound || index + 1 == size())
+    if (index == kNotFound || index + 1 == size())
         return 0;
     return at(index + 1).get();
 }
 
 Node* ContentDistribution::previousTo(const Node* node) const
 {
     size_t index = find(node);
-    if (index == notFound || !index)
+    if (index == kNotFound || !index)
         return 0;
     return at(index - 1).get();
 }
 
 } // namespace WebCore