Revert of Remove StringBuilder::appendLiteral.

third_party/WebKit/Source/core/css/CSSFontFaceRule.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2005, 2006, 2008, 2012 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.
  *
@@ skipping 30 matching lines @@
 CSSStyleDeclaration* CSSFontFaceRule::style() const
 {
     if (!m_propertiesCSSOMWrapper)
         m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_fontFaceRule->mutableProperties(), const_cast<CSSFontFaceRule*>(this));
     return m_propertiesCSSOMWrapper.get();
 }
 
 String CSSFontFaceRule::cssText() const
 {
     StringBuilder result;
-    result.append("@font-face { ");
+    result.appendLiteral("@font-face { ");
     String descs = m_fontFaceRule->properties().asText();
     result.append(descs);
     if (!descs.isEmpty())
         result.append(' ');
     result.append('}');
     return result.toString();
 }
 
 void CSSFontFaceRule::reattach(StyleRuleBase* rule)
 {
     ASSERT(rule);
     m_fontFaceRule = toStyleRuleFontFace(rule);
     if (m_propertiesCSSOMWrapper)
         m_propertiesCSSOMWrapper->reattach(m_fontFaceRule->mutableProperties());
 }
 
 DEFINE_TRACE(CSSFontFaceRule)
 {
     visitor->trace(m_fontFaceRule);
     visitor->trace(m_propertiesCSSOMWrapper);
     CSSRule::trace(visitor);
 }
 
 } // namespace blink