Speculative fix for dartc problem.

tools/testing/dart/test_suite.dart

Index: tools/testing/dart/test_suite.dart
diff --git a/tools/testing/dart/test_suite.dart b/tools/testing/dart/test_suite.dart
index b206efe6cf9860e9bb0ce9cd40f175e7c317c76b..6ae8e710183a0a347d31987c82ecad540048930a 100644
--- a/tools/testing/dart/test_suite.dart
+++ b/tools/testing/dart/test_suite.dart
@@ -467,13 +467,11 @@ class StandardTestSuite implements TestSuite {
       return commands;
 
     case 'none':
+    case 'dartc':
       var arguments = new List.from(vmOptions);
       arguments.addAll(args);
       return <Command>[new Command(shellPath(), arguments)];
 
-    case 'dartc':
-      return <Command>[new Command(shellPath(), args)];
-
     default:
       throw 'Unknown compiler ${configuration["compiler"]}';
     }