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

Source/core/css/CSSFontFaceSource.cpp

 /*
  * Copyright (C) 2007, 2008, 2010, 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 141 matching lines @@
         if (m_font) {
 #if ENABLE(SVG_FONTS)
             if (m_hasExternalSVGFont) {
                 // For SVG fonts parse the external SVG document, and extract the <font> element.
                 if (!m_font->ensureSVGFontData())
                     return 0;
 
                 if (!m_externalSVGFontElement) {
                     String fragmentIdentifier;
                     size_t start = m_string.find('#');
-                    if (start != notFound)
+                    if (start != kNotFound)
                         fragmentIdentifier = m_string.string().substring(start + 1);
                     m_externalSVGFontElement = m_font->getSVGFontById(fragmentIdentifier);
                 }
 
                 if (!m_externalSVGFontElement)
                     return 0;
 
                 SVGFontFaceElement* fontFaceElement = 0;
 
                 // Select first <font-face> child
@@ skipping 130 matching lines @@
     if (size < 50 * 1024)
         return "WebFont.DownloadTime.1.10KBTo50KB";
     if (size < 100 * 1024)
         return "WebFont.DownloadTime.2.50KBTo100KB";
     if (size < 1024 * 1024)
         return "WebFont.DownloadTime.3.100KBTo1MB";
     return "WebFont.DownloadTime.4.Over1MB";
 }
 
 }