Fix the Sky tests

sky/tests/resources/display_list.dart

 
 import 'package:sky/framework/rendering/object.dart';
 import 'package:sky/framework/rendering/box.dart';
 import 'dart:sky' as sky;
 
 typedef void Logger (String s);
 
 class TestDisplayList extends RenderObjectDisplayList {
   TestDisplayList(double width, double height, this.logger, { this.indent: '' }) :
     this.width = width,
@@ skipping 107 matching lines @@
     RenderObject.debugDoingPaint = false;
   }
 
 }
 
 class TestApp {
 
   TestApp(RenderBox root) {
     _renderView = new TestView(child: root);
     _renderView.attach();
-    _renderView.layout(new ViewConstraints(width: sky.view.width, height: sky.view.height));
+    _renderView.rootConstraints = new ViewConstraints(width: sky.view.width, height: sky.view.height);
+    _renderView.scheduleInitialLayout();
+    RenderObject.flushLayout();
     _renderView.paintFrame();
     print(_renderView.lastPaint); // TODO(ianh): figure out how to make this fit the unit testing framework better
   }
 
   RenderView _renderView;
 
   RenderBox get root => _renderView.child;
   void set root(RenderBox value) {
     _renderView.child = value;
   }
   void _beginFrame(double timeStamp) {
     RenderObject.flushLayout();
     _renderView.paintFrame();
     print(_renderView.lastPaint); // TODO(ianh): figure out how to make this fit the unit testing framework better
   }
 
 }