Add support for a timeout flag.

test/runner/runner_test.dart

 // 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.
 
 @TestOn("vm")
 
 import 'dart:io';
 import 'dart:math' as math;
 
 import 'package:scheduled_test/descriptor.dart' as d;
@@ skipping 326 matching lines @@
   });
 
   test("runs tests even when a file fails to load", () {
     d.file("test.dart", _success).create();
 
     var test = runTest(["test.dart", "nonexistent.dart"]);
     test.stdout.expect(consumeThrough(contains("+1 -1: Some tests failed.")));
     test.shouldExit(1);
   });
 
-  test("respects top-level @Timeout declarations", () {
-    d.file("test.dart", '''
-@Timeout(const Duration(seconds: 0))
-
-import 'dart:async';
-
-import 'package:test/test.dart';
-
-void main() {
-  test("timeout", () {});
-}
-''').create();
-
-    var test = runTest(["test.dart"]);
-    test.stdout.expect(containsInOrder([
-      "Test timed out after 0 seconds.",
-      "-1: Some tests failed."
-    ]));
-    test.shouldExit(1);
-  });
-
   test("respects top-level @Skip declarations", () {
     d.file("test.dart", '''
 @Skip()
 
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("fail", () => throw 'oh no');
@@ skipping 291 matching lines @@
         d.file("test.dart", _success).create();
 
         var test = runTest(["--plain-name", "no match", "test.dart"]);
         test.stderr.expect(
             consumeThrough(contains('No tests match "no match".')));
         test.shouldExit(exit_codes.data);
       });
     });
   });
 }