[Effen] add StyleNode

sky/framework/components/fixed_height_scrollable.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import '../animation/scroll_behavior.dart';
 import '../fn.dart';
 import 'dart:math' as math;
 import 'dart:sky' as sky;
 import 'scrollable.dart';
 
 abstract class FixedHeightScrollable extends Scrollable {
-  // TODO(rafaelw): This component really shouldn't have an opinion
-  // about how it is sized. The owning component should decide whether
-  // it's explicitly sized or flexible or whatever...
   static final Style _style = new Style('''
     overflow: hidden;
     position: relative;
-    flex: 1;
     will-change: transform;'''
   );
 
   static final Style _scrollAreaStyle = new Style('''
     position:relative;
     will-change: transform;'''
   );
 
   double _height = 0.0;
   double _itemHeight;
@@ skipping 50 matching lines @@
       children: [
         new Container(
           style: _scrollAreaStyle,
           inlineStyle: transformStyle,
           children: buildItems(itemNumber, drawCount)
         )
       ]
     );
   }
 }