Reduce unnecessary usage of TextCaseSensitivity::TextCaseInsensitive.

third_party/WebKit/Source/bindings/core/v8/ScriptRegexp.h

 /*
  * Copyright (C) 2003, 2008, 2009 Apple Inc. All rights reserved.
  * 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
@@ skipping 29 matching lines @@
 class CORE_EXPORT ScriptRegexp {
   USING_FAST_MALLOC(ScriptRegexp);
   WTF_MAKE_NONCOPYABLE(ScriptRegexp);
 
  public:
   enum CharacterMode {
     BMP,    // NOLINT
     UTF16,  // NOLINT
   };
 
+  // For TextCaseSensitivity argument, TextCaseASCIIInsensitive and
+  // TextCaseUnicodeInsensitive has identical behavior. They just add "i" flag.
   ScriptRegexp(const String&,
                TextCaseSensitivity,
                MultilineMode = MultilineDisabled,
                CharacterMode = BMP);
 
   int match(const String&, int startFrom = 0, int* matchLength = 0) const;
 
   bool isValid() const { return !m_regex.isEmpty(); }
   // exceptionMessage is available only if !isValid().
   String exceptionMessage() const { return m_exceptionMessage; }
 
  private:
   ScopedPersistent<v8::RegExp> m_regex;
   String m_exceptionMessage;
 };
 
 }  // namespace blink
 
 #endif  // ScriptRegexp_h