Reduce unnecessary usage of TextCaseSensitivity::TextCaseInsensitive.

third_party/WebKit/Source/platform/text/SegmentedString.h

 /*
     Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 206 matching lines @@
   enum LookAheadResult {
     DidNotMatch,
     DidMatch,
     NotEnoughCharacters,
   };
 
   LookAheadResult lookAhead(const String& string) {
     return lookAheadInline(string, TextCaseSensitive);
   }
   LookAheadResult lookAheadIgnoringCase(const String& string) {
-    return lookAheadInline(string, TextCaseInsensitive);
+    return lookAheadInline(string, TextCaseASCIIInsensitive);
   }
 
   void advance() {
     if (m_fastPathFlags & Use8BitAdvance) {
       m_currentChar = m_currentString.incrementAndGetCurrentChar8();
       decrementAndCheckLength();
       return;
     }
 
     (this->*m_advanceFunc)();
@@ skipping 177 matching lines @@
   bool m_closed;
   bool m_empty;
   unsigned char m_fastPathFlags;
   void (SegmentedString::*m_advanceFunc)();
   void (SegmentedString::*m_advanceAndUpdateLineNumberFunc)();
 };
 
 }  // namespace blink
 
 #endif