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

Source/core/css/StylePropertySerializer.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Research In Motion Limited. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. 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 697 matching lines @@
 {
     // FIXME: Ensure initial values do not appear in CSS_VALUE_LISTS.
     DEFINE_STATIC_REF_WILL_BE_PERSISTENT(CSSPrimitiveValue, initialRepeatValue, (CSSPrimitiveValue::create(CSSValueRepeat)));
     const CSSPrimitiveValue& repeatX = repeatXCSSValue.isInitialValue() ? *initialRepeatValue : toCSSPrimitiveValue(repeatXCSSValue);
     const CSSPrimitiveValue& repeatY = repeatYCSSValue.isInitialValue() ? *initialRepeatValue : toCSSPrimitiveValue(repeatYCSSValue);
     CSSValueID repeatXValueId = repeatX.getValueID();
     CSSValueID repeatYValueId = repeatY.getValueID();
     if (repeatXValueId == repeatYValueId) {
         builder.append(repeatX.cssText());
     } else if (repeatXValueId == CSSValueNoRepeat && repeatYValueId == CSSValueRepeat) {
-        builder.append("repeat-y");
+        builder.appendLiteral("repeat-y");
     } else if (repeatXValueId == CSSValueRepeat && repeatYValueId == CSSValueNoRepeat) {
-        builder.append("repeat-x");
+        builder.appendLiteral("repeat-x");
     } else {
         builder.append(repeatX.cssText());
-        builder.append(" ");
+        builder.appendLiteral(" ");
         builder.append(repeatY.cssText());
     }
 }
 
 String StylePropertySerializer::backgroundRepeatPropertyValue() const
 {
     RefPtrWillBeRawPtr<CSSValue> repeatX = m_propertySet.getPropertyCSSValue(CSSPropertyBackgroundRepeatX);
     RefPtrWillBeRawPtr<CSSValue> repeatY = m_propertySet.getPropertyCSSValue(CSSPropertyBackgroundRepeatY);
     if (!repeatX || !repeatY)
         return String();
@@ skipping 21 matching lines @@
     } else if (repeatY->cssValueType() == CSSValue::CSS_VALUE_LIST) {
         repeatYList = toCSSValueList(repeatY.get());
     } else {
         return String();
     }
 
     size_t shorthandLength = lowestCommonMultiple(repeatXList->length(), repeatYList->length());
     StringBuilder builder;
     for (size_t i = 0; i < shorthandLength; ++i) {
         if (i)
-            builder.append(", ");
+            builder.appendLiteral(", ");
         appendBackgroundRepeatValue(builder,
             *repeatXList->item(i % repeatXList->length()),
             *repeatYList->item(i % repeatYList->length()));
     }
     return builder.toString();
 }
 
 void StylePropertySerializer::appendBackgroundPropertyAsText(StringBuilder& result, unsigned& numDecls) const
 {
     if (isPropertyShorthandAvailable(backgroundShorthand())) {
@@ skipping 90 matching lines @@
             isInitialValue = false;
         if (!value->isInheritedValue())
             isInheritedValue = false;
         if (isImportant != m_propertySet.propertyIsImportant(shorthand.properties()[i]))
             return false;
     }
     return isInitialValue || isInheritedValue;
 }
 
 }