Add --time option to dart test scripts.

tools/testing/dart/test_suite.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("test_suite");
 
 #import("status_file_parser.dart");
 #import("test_runner.dart");
 #import("multitest.dart");
 
@@ skipping 60 matching lines @@
     } else {
       // Only run the tests that match the pattern. Use the name
       // "suiteName/testName" for cc tests.
       RegExp pattern = configuration['selectors'][suiteName];
       String constructedName = '$suiteName/$testName';
       if (!pattern.hasMatch(constructedName)) return;
 
       var expectations = testExpectations.expectations(testName);
 
       if (configuration["report"]) {
-          SummaryReport.add(expectations);
+        SummaryReport.add(expectations);
       }
 
       if (expectations.contains(SKIP)) return;
 
       // The cc test runner takes options after the name of the test
       // to run.
       var args = [testName];
       args.addAll(TestUtils.standardOptions(configuration));
 
       doTest(new TestCase('$suiteName/$testName',
@@ skipping 450 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);
   }
 }