Update test.dart for detection output of machine formatted errors

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 694 matching lines @@
   }
 
   void completeHandler(TestCase testCase) {
   }
 
   List<List<String>> argumentListsFromFile(String filename,
                                            Map optionsFromFile,
                                            bool enableFatalTypeErrors) {
     List args = TestUtils.standardOptions(configuration);
     args.addAll(additionalOptions(filename));
-    if (enableFatalTypeErrors && configuration['component'] == 'dartc') {
-      args.add('--fatal-type-errors');
+    if (configuration['component'] == 'dartc') {
+      args.add('--error_format');
+      args.add('machine');
+      if (enableFatalTypeErrors) {
+        args.add('--fatal-type-errors');
+      }
     }
 
     bool isMultitest = optionsFromFile["isMultitest"];
     List<String> dartOptions = optionsFromFile["dartOptions"];
     List<List<String>> vmOptionsList = optionsFromFile["vmOptions"];
     Expect.isTrue(!isMultitest || dartOptions == null);
     if (dartOptions == null) {
       args.add(filename);
     } else {
       var filename = dartOptions[0];
@@ skipping 412 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);
    }
 }