Changing window.requestLayoutFrame into a microtask API

samples/swarm/swarm_ui_lib/touch/Scroller.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.
 
 part of touch;
 
 /**
  * Implementation of a custom scrolling behavior.
  * This behavior overrides native scrolling for an area. This area can be a
  * single defined part of a page, the entire page, or several different parts
@@ skipping 215 matching lines @@
             break;
             */
         }
         if (handled) {
           e.preventDefault();
         }
       });
     // The scrollable element must be relatively positioned.
     // TODO(jacobr): this assert fires asynchronously which could be confusing.
     if (_scrollTechnique == ScrollerScrollTechnique.RELATIVE_POSITIONING) {
-      _element.computedStyle.then((CssStyleDeclaration style) {
-        assert(style.position != "static");
-      });
+      assert(_element.getComputedStyle().position != "static");
     }
 
     _initLayer();
   }
 
   EventListenerList get onScrollerStart {
     if (_onScrollerStart == null) {
       _onScrollerStart = new SimpleEventListenerList();
     }
     return _onScrollerStart;
@@ skipping 287 matching lines @@
     _minOffset.x = 0;
     _minOffset.y = 0;
     reconfigure(() => _setContentOffset(_maxPoint.x, _maxPoint.y));
   }
 
   /**
    * Recalculate dimensions of the frame and the content. Adjust the minPoint
    * and maxPoint allowed for scrolling.
    */
   void _resize(Callback callback) {
-    window.requestLayoutFrame(() {
+    window.setImmediate(() {
       if (_lookupContentSizeDelegate != null) {
         _contentSize = _lookupContentSizeDelegate();
       } else {
         _contentSize = new Size(_element.scrollWidth, _element.scrollHeight);
       }
 
       _scrollSize = new Size(_frame.offsetWidth,
                              _frame.offsetHeight);
       Size adjusted = _getAdjustedContentSize();
       _maxPoint = new Coordinate(-_maxOffset.x, -_maxOffset.y);
@@ skipping 158 matching lines @@
     for (EventListener listener in _listeners) {
       listener(evt);
     }
   }
 }
 
 class ScrollerScrollTechnique {
   static const TRANSFORM_3D = 1;
   static const RELATIVE_POSITIONING = 2;
 }