[Effen] Remove 'display' from drawer_header.dart.

sky/framework/components/drawer_header.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 '../theme/colors.dart';
 import '../theme/view_configuration.dart';
 
 class DrawerHeader extends Component {
   static final Style _style = new Style('''
-    display: flex;
-    flex-direction: column;
     height: ${140 + kStatusBarHeight}px;
-    -webkit-user-select: none;
     background-color: ${BlueGrey[50]};
     border-bottom: 1px solid #D1D9E1;
     padding-bottom: 7px;
     margin-bottom: 8px;'''
   );
 
-  static final Style _spacerStyle = new Style('''
-    flex: 1'''
-  );
+  static final FlexBoxParentData _spacerParentData = new FlexBoxParentData()..flex = 1;
 
   static final Style _labelStyle = new Style('''
     padding: 0 16px;'''
   );
 
   List<UINode> children;
 
   DrawerHeader({ Object key, this.children }) : super(key: key);
 
   UINode build() {
-    return new Container(
+    return new FlexContainer(
+      direction: FlexDirection.Column,
       style: _style,
       children: [
-        new Container(
-          key: 'Spacer',
-          style: _spacerStyle
+        new ParentDataNode(
+          new Container(key: 'Spacer'),
+          _spacerParentData
         ),
         new Container(
           key: 'Label',
           style: _labelStyle,
           children: children
         )
       ]
     );
   }
 }