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

Source/wtf/text/TextPosition.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:
  * 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 19 matching lines @@
 
 namespace WTF {
 
 PassOwnPtr<Vector<unsigned> > lineEndings(const String& text)
 {
     OwnPtr<Vector<unsigned> > result(adoptPtr(new Vector<unsigned>()));
 
     unsigned start = 0;
     while (start < text.length()) {
         size_t lineEnd = text.find('\n', start);
-        if (lineEnd == notFound)
+        if (lineEnd == kNotFound)
             break;
 
         result->append(static_cast<unsigned>(lineEnd));
         start = lineEnd + 1;
     }
     result->append(text.length());
 
     return result.release();
 }
 
 static inline unsigned valueExtractor(const unsigned* value)
 {
     return *value;
 }
 
 TextPosition TextPosition::fromOffsetAndLineEndings(unsigned offset, const Vector<unsigned>& lineEndings)
 {
     const unsigned* foundLineEnding = approximateBinarySearch<unsigned, unsigned>(lineEndings, lineEndings.size(), offset, valueExtractor);
     int lineIndex = foundLineEnding - &lineEndings.at(0);
     if (offset > *foundLineEnding)
         ++lineIndex;
     unsigned lineStartOffset = lineIndex > 0 ? lineEndings.at(lineIndex - 1) + 1 : 0;
     int column = offset - lineStartOffset;
     return TextPosition(OrdinalNumber::fromZeroBasedInt(lineIndex), OrdinalNumber::fromZeroBasedInt(column));
 }
 
 } // namespace WTF