Mark test flaky

test/browser/language_tests.js

 // Copyright (c) 2015, 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.
 
 define(['dart_sdk', 'async_helper', 'unittest', 'require'],
       function(dart_sdk, async_helper, unittest, require) {
   'use strict';
 
   async_helper = async_helper.async_helper;
 
@@ skipping 18 matching lines @@
   // there are a lot of broken html unittests.
   let num_expected_unittest_fails = 3;
   let num_expected_unittest_errors = 2;
 
   // TODO(jmesserly): separate StrongModeError from other errors.
   let all_status = {
     'language': {
       'assert_with_type_test_or_cast_test': skip_fail,
       'assertion_test': skip_fail,
       'async_await_test_none_multi': 'unittest',
+      'async_await_test_03_multi': skip_fail,  // Flaky on travis (#634)
       'async_star_await_pauses_test': skip_fail,
 
       // TODO(jmesserly): figure out why this test is hanging.
       'async_star_cancel_and_throw_in_finally_test': skip_timeout,
 
       'async_star_cancel_while_paused_test': skip_fail,
       'async_star_regression_fisk_test': skip_fail,
 
       // TODO(vsm): Re-enable.
       // See https://github.com/dart-lang/dev_compiler/issues/456
@@ skipping 824 matching lines @@
 
     for (let action of unittest_tests) {
       try {
         action();
       } catch (e) {
         console.error("Caught error tying to setup test:", e);
       }
     }
   });
 });