Reapply remove setInterval.

samples/tests/samples/lib/layout/layout_test.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 layout_tests;
 
+import 'dart:async';
 import 'dart:html';
 import '../../../../swarm/swarm_ui_lib/base/base.dart';
 import '../../../../swarm/swarm_ui_lib/layout/layout.dart';
 import '../../../../swarm/swarm_ui_lib/view/view.dart';
 import '../../../../swarm/swarm_ui_lib/util/utilslib.dart';
 import '../../../../../pkg/unittest/lib/unittest.dart';
 import '../../../../../pkg/unittest/lib/html_config.dart';
 
 part 'grid_layout_demo.dart';
 part 'grid_examples.dart';
@@ skipping 132 matching lines @@
     });
   });
 }
 
 // Note: to debug failures, best bet is to use GridLayoutDemo to run an
 // individual asyncTest and see the resulting layout.
 
 usingGrid(String example, void test_(View grid)) {
   final grid = createGrid(GridExamples.styles[example]);
   grid.addToDocument(document.body);
-  window.setTimeout(() {
+  Timer.run(() {
     test_(grid);
-    window.setTimeout(expectAsync0(() { grid.removeFromDocument(); }), 0);
-  }, 0);
+    Timer.run(expectAsync0(() { grid.removeFromDocument(); }));
+  });
 }
 
 verifyGrid(String example, [Map expected = null]) {
   printMetrics(example);
   if (expected == null) {
     return;
   }
 
   for (String name in expected.keys) {
     final values = expected[name];
     final node = document.body.query('#$name');
     Expect.isNotNull(node);
     window.setImmediate(expectAsync0(() {
       Expect.equals(values[0], node.offsetLeft);
       Expect.equals(values[1], node.offsetTop);
       Expect.equals(values[2], node.offsetWidth);
       Expect.equals(values[3], node.offsetHeight);
     }));
   }
 }
 
 verifyExample(String example, [Map expected = null]) {
   usingGrid(example, (grid) => verifyGrid(example, expected));
 }