Speculative fix for dartc problem.

tools/testing/dart/test_suite.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.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
@@ skipping 449 matching lines @@
             ['--enable_checked_mode', '$tempDir/out.dart']);
         commands.add(new Command(
             TestUtils.vmFileName(configuration),
             vmArguments));
       } else {
         throw 'Unsupported runtime ${configuration["runtime"]} for dart2dart';
       }
       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"]}';
     }
   }
 
   Function makeTestCaseCreator(Map optionsFromFile) {
     return (Path filePath,
             bool isNegative,
             [bool isNegativeIfChecked = false,
              bool hasFatalTypeErrors = false,
@@ skipping 945 matching lines @@
  * $noCrash tests are expected to be flaky but not crash
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
 """;
     print(report);
    }
 }