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

Source/core/css/CSSBasicShapes.cpp

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * 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.
@@ skipping 41 matching lines @@
 
     if (!centerX.isNull() || !centerY.isNull()) {
         if (!radius.isNull())
             result.appendLiteral(separator);
         result.append(at);
         result.appendLiteral(separator);
         result.append(centerX);
         result.appendLiteral(separator);
         result.append(centerY);
     }
-    result.append(")");
+    result.append(')');
     if (box.length()) {
         result.appendLiteral(separator);
         result.append(box);
     }
     return result.toString();
 }
 
 static String serializePositionOffset(const Pair& offset, const Pair& other)
 {
     if ((offset.first()->getValueID() == CSSValueLeft && other.first()->getValueID() == CSSValueTop)
@@ skipping 91 matching lines @@
 
     if (!centerX.isNull() || !centerY.isNull()) {
         if (needsSeparator)
             result.appendLiteral(separator);
         result.appendLiteral(at);
         result.appendLiteral(separator);
         result.append(centerX);
         result.appendLiteral(separator);
         result.append(centerY);
     }
-    result.append(")");
+    result.append(')');
     if (box.length()) {
         result.appendLiteral(separator);
         result.append(box);
     }
     return result.toString();
 }
 
 String CSSBasicShapeEllipse::cssText() const
 {
     RefPtrWillBeRawPtr<CSSPrimitiveValue> normalizedCX = buildSerializablePositionOffset(m_centerX, CSSValueLeft);
@@ skipping 258 matching lines @@
     visitor->trace(m_left);
     visitor->trace(m_topLeftRadius);
     visitor->trace(m_topRightRadius);
     visitor->trace(m_bottomRightRadius);
     visitor->trace(m_bottomLeftRadius);
     CSSBasicShape::trace(visitor);
 }
 
 } // namespace blink