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

Source/core/html/track/WebVTTParser.cpp

 /*
  * Copyright (C) 2011 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 78 matching lines @@
 
     return number;
 }
 
 FloatPoint WebVTTParser::parseFloatPercentageValuePair(const String& value, char delimiter, bool& isValidSetting)
 {
     // The delimiter can't be the first or second value because a pair of
     // percentages (x%,y%) implies that at least the first two characters
     // are the first percentage value.
     size_t delimiterOffset = value.find(delimiter, 2);
-    if (delimiterOffset == notFound || delimiterOffset == value.length() - 1) {
+    if (delimiterOffset == kNotFound || delimiterOffset == value.length() - 1) {
         isValidSetting = false;
         return FloatPoint(0, 0);
     }
 
     bool isFirstValueValid;
     float firstCoord = parseFloatPercentageValue(value.substring(0, delimiterOffset), isFirstValueValid);
 
     bool isSecondValueValid;
     float secondCoord = parseFloatPercentageValue(value.substring(delimiterOffset + 1, value.length() - 1), isSecondValueValid);
 
@@ skipping 163 matching lines @@
     // 4-5 - Collect a WebVTT timestamp. If that fails, then abort and return failure. Otherwise, let cue's text track cue start time be the collected time.
     m_currentStartTime = collectTimeStamp(line, &position);
     if (m_currentStartTime == malformedTime)
         return BadCue;
     if (position >= line.length())
         return BadCue;
 
     skipWhiteSpace(line, &position);
 
     // 6-9 - If the next three characters are not "-->", abort and return failure.
-    if (line.find("-->", position) == notFound)
+    if (line.find("-->", position) == kNotFound)
         return BadCue;
     position += 3;
     if (position >= line.length())
         return BadCue;
 
     skipWhiteSpace(line, &position);
 
     // 10-11 - Collect a WebVTT timestamp. If that fails, then abort and return failure. Otherwise, let cue's text track cue end time be the collected time.
     m_currentEndTime = collectTimeStamp(line, &position);
     if (m_currentEndTime == malformedTime)
@@ skipping 272 matching lines @@
     unsigned oldPosition = *position;
     while (*position < length && data[*position] != '\r' && data[*position] != '\n')
         (*position)++;
     String line = String::fromUTF8(data + oldPosition, *position - oldPosition);
     skipLineTerminator(data, length, position);
     return line;
 }
 
 }