Revert of Remove StringBuilder::appendLiteral.

third_party/WebKit/Source/wtf/DateMath.cpp

 /*
  * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2007-2009 Torch Mobile, Inc.
  * Copyright (C) 2010 &yet, LLC. (nate@andyet.net)
  *
  * The Original Code is Mozilla Communicator client code, released
  * March 31, 1998.
  *
@@ skipping 782 matching lines @@
         offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);
     }
     return ms - (offset * msPerMinute);
 }
 
 // See http://tools.ietf.org/html/rfc2822#section-3.3 for more information.
 String makeRFC2822DateString(unsigned dayOfWeek, unsigned day, unsigned month, unsigned year, unsigned hours, unsigned minutes, unsigned seconds, int utcOffset)
 {
     StringBuilder stringBuilder;
     stringBuilder.append(weekdayName[dayOfWeek]);
-    stringBuilder.append(", ");
+    stringBuilder.appendLiteral(", ");
     stringBuilder.appendNumber(day);
     stringBuilder.append(' ');
     stringBuilder.append(monthName[month]);
     stringBuilder.append(' ');
     stringBuilder.appendNumber(year);
     stringBuilder.append(' ');
 
     appendTwoDigitNumber(stringBuilder, hours);
     stringBuilder.append(':');
     appendTwoDigitNumber(stringBuilder, minutes);
@@ skipping 10 matching lines @@
 }
 
 double convertToLocalTime(double ms)
 {
     double utcOffset = calculateUTCOffset();
     double dstOffset = calculateDSTOffset(ms, utcOffset);
     return (ms + utcOffset + dstOffset);
 }
 
 } // namespace WTF