Explicitly use node.js in the cases where it is needed.

dart/utils/tests/dartdoc/test_config.dart

 // Copyright (c) 2012, 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("dartdoc_test_config");
 
 #import("../../../tools/testing/dart/test_suite.dart");
 
 class DartdocTestSuite extends StandardTestSuite {
   DartdocTestSuite(Map configuration)
       : super(configuration,
               "dartdoc",
               "utils/tests/dartdoc/src",
               ["utils/tests/dartdoc/dartdoc.status"]);
 
+  List<String> additionalOptions(String filename) {
+    if (configuration['component'].startsWith('frog')) {
+      return ['--js_cmd=node --crankshaft'];
+    } else {
+      return [];
+    }
+  }
+
+
   bool isTestFile(String filename) => filename.endsWith("_tests.dart");
 }