[Effen] remove more CSS

sky/framework/components/scaffold.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 '../fn.dart';
+import '../layout.dart';
 import 'drawer.dart';
 import 'floating_action_button.dart';
 import 'package:sky/framework/theme/typography.dart' as typography;
 
 class Scaffold extends Component {
   static final Style _style = new Style('''
     ${typography.typeface};
     ${typography.black.body1};''');
 
   static final Style _mainStyle = new Style('''
-    display: flex;
-    flex-direction: column;
     height: -webkit-fill-available;''');
 
-  static final Style _contentStyle = new Style('''
-    flex: 1;''');
+  static final FlexBoxParentData _contentParentData = new FlexBoxParentData()..flex = 1;
 
   static final Style _fabStyle = new Style('''
     position: absolute;
     bottom: 16px;
     right: 16px;''');
 
   static final Style _drawerStyle = new Style('''
     position: absolute;
     top: 0;
     left: 0;
@@ skipping 10 matching lines @@
     Object key,
     this.header,
     this.content,
     this.fab,
     this.drawer,
     this.overlays
   }) : super(key: key);
 
   UINode build() {
     List<UINode> children = [
-      new Container(
+      new FlexContainer(
         key: 'Main',
+        direction: FlexDirection.Column,
         style: _mainStyle,
-        children: [header, new StyleNode(content, _contentStyle)])
+        children: [header, new ParentDataNode(content, _contentParentData)])
     ];
 
     if (fab != null)
       children.add(new StyleNode(fab, _fabStyle));
 
     if (drawer != null)
       children.add(new StyleNode(drawer, _drawerStyle));
 
     if (overlays != null)
       children.addAll(overlays);
 
     return new Container(style: _style, children: children);
   }
 }