Use StringBuilder::appendLiteral() / StringBuilder::append(char) when possible

Source/core/css/CSSComputedStyleDeclaration.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
@@ skipping 1143 matching lines @@
 
 String CSSComputedStyleDeclaration::cssText() const
 {
     StringBuilder result;
     const Vector<CSSPropertyID>& properties = computableProperties();
 
     for (unsigned i = 0; i < properties.size(); i++) {
         if (i)
             result.append(' ');
         result.append(getPropertyName(properties[i]));
-        result.append(": ", 2);
+        result.appendLiteral(": ");
         result.append(getPropertyValue(properties[i]));
         result.append(';');
     }
 
     return result.toString();
 }
 
 void CSSComputedStyleDeclaration::setCSSText(const String&, ExceptionState& exceptionState)
 {
     exceptionState.throwDOMException(NoModificationAllowedError, "These styles are computed, and therefore read-only.");
@@ skipping 1833 matching lines @@
     return list.release();
 }
 
 void CSSComputedStyleDeclaration::trace(Visitor* visitor)
 {
     visitor->trace(m_node);
     CSSStyleDeclaration::trace(visitor);
 }
 
 } // namespace blink