Fix the Sky tests

sky/tests/raw/padding_deflate.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 'dart:sky' as sky;
 import '../resources/third_party/unittest/unittest.dart';
 import '../resources/unit.dart';
 import '../resources/display_list.dart';
 import 'package:sky/framework/rendering/box.dart';
+import 'package:sky/framework/rendering/object.dart';
 
 void main() {
   initUnit();
 
   test("should not have a 0 sized colored Box", () {
     var coloredBox = new RenderDecoratedBox(
       decoration: new BoxDecoration()
     );
     var paddingBox = new RenderPadding(padding: const EdgeDims.all(10.0),
         child: coloredBox);
     RenderBox root = new RenderDecoratedBox(
       decoration: new BoxDecoration(),
       child: paddingBox
     );
     TestView renderView = new TestView(child: root);
-    renderView.layout(new ViewConstraints(width: sky.view.width, height: sky.view.height));
+    renderView.attach();
+    renderView.rootConstraints = new ViewConstraints(width: sky.view.width, height: sky.view.height);
+    renderView.scheduleInitialLayout();
+    RenderObject.flushLayout();
     expect(coloredBox.size.width, equals(sky.view.width - 20));
     expect(coloredBox.size.height, equals(sky.view.height - 20));
   });
 }