Big merge from experimental to bleeding edge.

samples/swarm/swarm_ui_lib/view/view.dart

 // Copyright (c) 2012, 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 view;
 
+import 'dart:async';
 import 'dart:html';
 import 'dart:math' as Math;
 
 import '../base/base.dart';
 import '../observable/observable.dart';
 import '../touch/touch.dart';
 import '../layout/layout.dart';
 
 part 'CompositeView.dart';
 part 'ConveyorView.dart';
@@ skipping 347 matching lines @@
     }
   }
 
   void _applyLayout() {
     if (_layout != null) {
       _layout.applyLayout();
     }
     _applyLayoutToChildren();
   }
 }