Converting Polymer's WebComponentsLoaded to an onReady future

samples/third_party/todomvc/test/markdone_test.dart

Index: samples/third_party/todomvc/test/markdone_test.dart
diff --git a/samples/third_party/todomvc/test/markdone_test.dart b/samples/third_party/todomvc/test/markdone_test.dart
index 8a866074815805aeae532ebc80950ab24a00ef2e..49b6e57f10932b417d9301517e85fe31f81107ff 100644
--- a/samples/third_party/todomvc/test/markdone_test.dart
+++ b/samples/third_party/todomvc/test/markdone_test.dart
@@ -4,7 +4,6 @@
 
 library todomvc.test.markdone_test;
 
-import 'dart:async';
 import 'dart:html';
 import 'package:polymer/polymer.dart';
 import 'package:unittest/unittest.dart';
@@ -50,7 +49,7 @@ Node findShadowHost(Node node, ShadowRoot root) {
 main() {
   useHtmlConfiguration();
 
-  setUp(() => new Future.delayed(Duration.ZERO));
+  setUp(() => Polymer.onReady);
 
   test('mark done', () {
     appModel.todos.add(new Todo('one (unchecked)'));