Remove ASSERT_ARG().

third_party/WebKit/Source/platform/text/UnicodeUtilities.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov.
  *
  * 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 64 matching lines @@
     s.replace(leftSingleQuotationMarkCharacter, '\'');
     s.replace(rightDoubleQuotationMarkCharacter, '"');
     s.replace(rightSingleQuotationMarkCharacter, '\'');
     // Replace soft hyphen with an ignorable character so that their presence or absence will
     // not affect string comparison.
     s.replace(softHyphenCharacter, 0);
 }
 
 static bool isNonLatin1Separator(UChar32 character)
 {
-    ASSERT_ARG(character, character >= 256);
-
+    DCHECK_GE(character, 256);
     return U_GET_GC_MASK(character) & (U_GC_S_MASK | U_GC_P_MASK | U_GC_Z_MASK | U_GC_CF_MASK);
 }
 
 bool isSeparator(UChar32 character)
 {
     static const bool latin1SeparatorTable[256] = {
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // space ! " # $ % & ' ( ) * + , - . /
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, //                         : ; < = > ?
@@ skipping 308 matching lines @@
         if (offset == kNotFound)
             return false;
 
         // Update values of |a| and |b| after comparing.
         a += offset;
         b += offset;
     }
 }
 
 } // namespace blink