Revert 154802 "Don't use Vector<UChar> to build strings"

trunk/Source/core/css/CSSPrimitiveValue.cpp

Index: trunk/Source/core/css/CSSPrimitiveValue.cpp
===================================================================
--- trunk/Source/core/css/CSSPrimitiveValue.cpp	(revision 154824)
+++ trunk/Source/core/css/CSSPrimitiveValue.cpp	(working copy)
@@ -1025,21 +1025,21 @@
                 Color::parseHexColor(m_value.string, rgbColor);
             Color color(rgbColor);
 
-            StringBuilder result;
-            result.reserveCapacity(32);
+            Vector<LChar> result;
+            result.reserveInitialCapacity(32);
             bool colorHasAlpha = color.hasAlpha();
             if (colorHasAlpha)
                 result.append("rgba(", 5);
             else
                 result.append("rgb(", 4);
 
-            result.appendNumber(static_cast<unsigned char>(color.red()));
+            appendNumber(result, static_cast<unsigned char>(color.red()));
             result.append(", ", 2);
 
-            result.appendNumber(static_cast<unsigned char>(color.green()));
+            appendNumber(result, static_cast<unsigned char>(color.green()));
             result.append(", ", 2);
 
-            result.appendNumber(static_cast<unsigned char>(color.blue()));
+            appendNumber(result, static_cast<unsigned char>(color.blue()));
             if (colorHasAlpha) {
                 result.append(", ", 2);
 
@@ -1049,7 +1049,7 @@
             }
 
             result.append(')');
-            text = result.toString();
+            text = String::adopt(result);
             break;
         }
         case CSS_PAIR: