Combine window.setTimeout/setInterval with Timer and Timer.repeating. Also

samples/swarm/Views.dart

Index: samples/swarm/Views.dart
diff --git a/samples/swarm/Views.dart b/samples/swarm/Views.dart
index 48329c022bb640e1140a415d9537132fd26a7309..adaceec1a9d0caa36f9444b7bd51e11501f4e4a6 100644
--- a/samples/swarm/Views.dart
+++ b/samples/swarm/Views.dart
@@ -531,7 +531,7 @@ class GenericListView<D> extends View {
       FxUtil.setTranslate(view.node, currentPosition.x, currentPosition.y, 0);
       // The view's position is unchanged except now re-parented to
       // the list view.
-      window.setTimeout(() { _positionSubview(view.node, index); }, 0);
+      Timer.run(() { _positionSubview(view.node, index); });
     } else {
       _positionSubview(view.node, index);
     }