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

Source/core/css/CSSBasicShapes.cpp

Index: Source/core/css/CSSBasicShapes.cpp
diff --git a/Source/core/css/CSSBasicShapes.cpp b/Source/core/css/CSSBasicShapes.cpp
index 7f7644d0b39cdad79bfccda180021a0e5e48933e..d49bcad450d327d573bf09d72360de2f10eb3979 100644
--- a/Source/core/css/CSSBasicShapes.cpp
+++ b/Source/core/css/CSSBasicShapes.cpp
@@ -59,7 +59,7 @@ static String buildCircleString(const String& radius, const String& centerX, con
         result.appendLiteral(separator);
         result.append(centerY);
     }
-    result.append(")");
+    result.append(')');
     if (box.length()) {
         result.appendLiteral(separator);
         result.append(box);
@@ -171,7 +171,7 @@ static String buildEllipseString(const String& radiusX, const String& radiusY, c
         result.appendLiteral(separator);
         result.append(centerY);
     }
-    result.append(")");
+    result.append(')');
     if (box.length()) {
         result.appendLiteral(separator);
         result.append(box);