Add more test configurations. Everything seems covered for frog again now.

utils/tests/css/test_config.dart

+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#library("css_test_config");
+
+#import("../../../tools/testing/dart/test_suite.dart");
+
+class CssTestSuite extends StandardTestSuite {
+  CssTestSuite(Map configuration)
+      : super(configuration,
+              "css",
+              "utils/tests/css/src",
+              ["utils/tests/css/css.status"]);
+}