[Effen] Start removing 'position'.

sky/framework/fn.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.
 
 library fn;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:sky' as sky;
 import 'reflect.dart' as reflect;
@@ skipping 575 matching lines @@
     style: style,
     inlineStyle: inlineStyle
   );
 
   void _syncNode(UINode old) {
     super._syncNode(old);
     _root.direction = direction;
   }
 }
 
+class FillStackContainer extends SkyElementWrapper {
+
+  RenderCSSStack _root;
+  RenderCSSStack _createNode() => new RenderCSSStack(this);
+
+  static final FillStackContainer _emptyContainer = new FillStackContainer();
+
+  SkyNodeWrapper get _emptyNode => _emptyContainer;
+
+  FillStackContainer({
+    Object key,
+    List<UINode> children,
+    Style style,
+    String inlineStyle
+  }) : super(
+    key: key,
+    children: _positionNodesToFill(children),
+    style: style,
+    inlineStyle: inlineStyle
+  );
+
+  static StackParentData _fillParentData = new StackParentData()
+                                                 ..top = 0.0
+                                                 ..left = 0.0
+                                                 ..right = 0.0
+                                                 ..bottom = 0.0;
+
+  static List<UINode> _positionNodesToFill(List<UINode> input) {
+    if (input == null)
+      return null;
+    return input.map((node) {
+      return new ParentDataNode(node, _fillParentData);
+    }).toList();
+  }
+}
+
 class TextFragment extends SkyElementWrapper {
 
   RenderCSSInline _root;
   RenderCSSInline _createNode() => new RenderCSSInline(this, this.data);
 
   static final TextFragment _emptyText = new TextFragment('');
 
   SkyNodeWrapper get _emptyNode => _emptyText;
 
   final String data;
@@ skipping 273 matching lines @@
     _sync(null, _host, _root);
   }
 }
 
 class Text extends Component {
   Text(this.data) : super(key: '*text*');
   final String data;
   bool get interchangeable => true;
   UINode build() => new Paragraph(children: [new TextFragment(data)]);
 }