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

Source/core/html/HTMLImportLoader.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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 135 matching lines @@
 
 Document* HTMLImportLoader::importedDocument() const
 {
     if (m_state == StateError)
         return 0;
     return m_importedDocument.get();
 }
 
 void HTMLImportLoader::addClient(HTMLImportLoaderClient* client)
 {
-    ASSERT(notFound == m_clients.find(client));
+    ASSERT(kNotFound == m_clients.find(client));
     m_clients.append(client);
     if (isDone())
         client->didFinish();
 }
 
 void HTMLImportLoader::removeClient(HTMLImportLoaderClient* client)
 {
-    ASSERT(notFound != m_clients.find(client));
+    ASSERT(kNotFound != m_clients.find(client));
     m_clients.remove(m_clients.find(client));
 }
 
 void HTMLImportLoader::importDestroyed()
 {
     m_parent = 0;
     if (RefPtr<Document> document = m_importedDocument.release())
         document->setImport(0);
 }
 
@@ skipping 25 matching lines @@
 }
 
 bool HTMLImportLoader::isProcessing() const
 {
     if (!m_importedDocument)
         return !isDone();
     return m_importedDocument->parsing();
 }
 
 } // namespace WebCore