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

Source/core/editing/TextInsertionBaseCommand.h

 /*
  * Copyright (C) 2012 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 35 matching lines @@
 String dispatchBeforeTextInsertedEvent(const String& text, const VisibleSelection& selectionForInsertion, bool insertionIsForUpdatingComposition);
 bool canAppendNewLineFeedToSelection(const VisibleSelection&);
 
 // LineOperation should define member function "opeartor (size_t lineOffset, size_t lineLength, bool isLastLine)".
 // lienLength doesn't include the newline character. So the value of lineLength could be 0.
 template <class LineOperation>
 void forEachLineInString(const String& string, const LineOperation& operation)
 {
     unsigned offset = 0;
     size_t newline;
-    while ((newline = string.find('\n', offset)) != notFound) {
+    while ((newline = string.find('\n', offset)) != kNotFound) {
         operation(offset, newline - offset, false);
         offset = newline + 1;
     }
     if (!offset)
         operation(0, string.length(), true);
     else {
         unsigned length = string.length();
         if (length != offset)
             operation(offset, length - offset, true);
     }
 }
 
 }
 
 #endif