Verify that callers correctly set parentUsesSize if they use the child's size (and fix a few cases …

sky/examples/widgets/spinning_mixed.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 'package:sky/framework/rendering/box.dart';
 import 'package:sky/framework/rendering/flex.dart';
 import 'package:sky/framework/scheduler.dart';
 import 'package:sky/framework/widgets/raised_button.dart';
@@ skipping 53 matching lines @@
 
 void rotate(double timeStamp) {
   if (timeBase == null)
     timeBase = timeStamp;
   double delta = (timeStamp - timeBase) / 1000; // radians
 
   transformBox.setIdentity();
   transformBox.translate(transformBox.size.width / 2.0, transformBox.size.height / 2.0);
   transformBox.rotateZ(delta);
   transformBox.translate(-transformBox.size.width / 2.0, -transformBox.size.height / 2.0);
-
-  // tester.checkFrame();
 }
 
-final bool debugDisplayList = false; // set this to true to use the test rendering logic
-
 void main() {
   // Because we're going to use UINodes, we want to initialise its
   // AppView, not use the default one. We don't really need to do
   // this, because RenderObjectToUINodeAdapter does it for us, but
   // it's good practice in case we happen to not have a
   // RenderObjectToUINodeAdapter in our tree at startup, or in case we
   // want a renderViewOverride.
-  UINodeAppView.initUINodeAppView(renderViewOverride: debugDisplayList ? tester : null);
+  UINodeAppView.initUINodeAppView();
 
   RenderFlex flexRoot = new RenderFlex(direction: FlexDirection.vertical);
 
   RenderProxyBox proxy = new RenderProxyBox();
   new RenderObjectToUINodeAdapter(proxy, builder); // adds itself to proxy
 
   addFlexChildSolidColor(flexRoot, const sky.Color(0xFFFF00FF), flex: 1);
   flexRoot.add(proxy);
   addFlexChildSolidColor(flexRoot, const sky.Color(0xFF0000FF), flex: 1);
 
   transformBox = new RenderTransform(child: flexRoot, transform: new Matrix4.identity());
   RenderPadding root = new RenderPadding(padding: new EdgeDims.all(20.0), child: transformBox);
 
   UINodeAppView.appView.root = root;
   addPersistentFrameCallback(rotate);
 }