Only run missing_tick_test for 2 seconds, before timeing out.

pkg/pkg.status

 # 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.
 
 # Don't run any test-like files that show up in packages directories. It
 # shouldn't be necessary to run "pub install" in these packages, but if you do
 # it shouldn't break the tests.
 */packages/*/*: Skip
 */*/packages/*/*: Skip
 */*/*/packages/*/*: Skip
@@ skipping 279 matching lines @@
 polymer_expressions/test/syntax_test: Skip
 polymer_expressions/test/globals_test: Skip
 polymer_expressions/test/bindings_test: Skip
 third_party/html5lib/test/browser/browser_test: Skip
 
 [ $runtime == safari || $runtime == chrome || $runtime == ie9 || $runtime == ff || $runtime == dartium || $runtime == drt ]
 docgen/test/single_library_test: Skip # Uses dart:io
 scheduled_test/test/scheduled_server_test: Skip # Uses dart:io
 
 [ $browser || $runtime == vm ]
-unittest/test/missing_tick_test: Timeout, Fail, OK # This test should fail, not time out.
+unittest/test/missing_tick_test: Fail, OK # Expected to fail, due to timeout.
 
 # Issue http://dartbug.com/12930
 [ $runtime == vm ]
 intl/test/message_extraction/message_extraction_test: Pass, Fail # Issue 12930
 
 [ $compiler == none && ($runtime == dartium || $runtime == drt) ]
 source_maps/test/parser_test: Pass, Timeout # Issue 13719: Please triage this failure.
 polymer_expressions/test/bindings_test: Fail, Pass # Issue 14445.
 
 [ $compiler == dartanalyzer || $compiler == dart2analyzer ]
 docgen/test/single_library_test: StaticWarning
 http_server/test/http_body_test: StaticWarning
 http_server/test/http_multipart_test: StaticWarning
 http_server/test/virtual_directory_test: StaticWarning
 http_server/test/virtual_host_test: StaticWarning
 http/test/client_test: StaticWarning
 http/test/http_test: StaticWarning
 http/test/mock_client_test: StaticWarning
 http/test/multipart_test: StaticWarning
 http/test/request_test: StaticWarning
 http/test/streamed_request_test: StaticWarning
 intl/test/date_time_format_file_even_test: StaticWarning
 intl/test/date_time_format_file_odd_test: StaticWarning
 intl/test/date_time_format_http_request_test: StaticWarning
 intl/test/date_time_format_local_even_test: StaticWarning
 intl/test/date_time_format_local_odd_test: StaticWarning
 unittest/test/matchers_test: StaticWarning, OK # testing error creating abstract class
 unittest/test/mock_test: StaticWarning, OK # testing unimplemented members