Fix tests that use a 0-length timeout.

test/runner/pause_after_load_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:async';
 import 'dart:io';
 
 import 'package:scheduled_test/descriptor.dart' as d;
@@ skipping 223 matching lines @@
       "Once you're finished, return to this terminal and press Enter."
     ])));
 
     test.signal(ProcessSignal.SIGTERM);
     test.shouldExit();
     test.stderr.expect(isDone);
   }, testOn: "!windows");
 
   test("disables timeouts", () {
     d.file("test.dart", """
+import 'dart:async';
+
 import 'package:test/test.dart';
 
 void main() {
   print('loaded test 1!');
 
-  test("success", () {}, timeout: new Timeout(Duration.ZERO));
+  test("success", () async {
+    await new Future.delayed(Duration.ZERO);
+  }, timeout: new Timeout(Duration.ZERO));
 }
 """).create();
 
     var test = runTest(
         ["--pause-after-load", "-p", "dartium", "-n", "success", "test.dart"]);
     test.stdout.expect(consumeThrough("loaded test 1!"));
     test.stdout.expect(consumeThrough(inOrder([
       startsWith("Observatory URL: "),
       "The test runner is paused. Open the dev console in Dartium or the "
           "Observatory and set breakpoints.",
@@ skipping 53 matching lines @@
       // our input.
       await new Future.delayed(new Duration(seconds: 2));
       expect(nextLineFired, isFalse);
     });
 
     test.writeLine('');
     test.stdout.expect(consumeThrough(contains("+1: All tests passed!")));
     test.shouldExit(0);
   });
 }