Remove RenderSizedBox.

sky/examples/rendering/borders.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:math' as math;
 import 'dart:sky' as sky;
 import 'package:sky/app/view.dart';
 import 'package:sky/rendering/box.dart';
 import 'package:sky/rendering/block.dart';
 
 AppView app;
 
 void main() {
 
 
   var root = new RenderBlock(children: [
     new RenderPadding(
       padding: new EdgeDims.all(10.0),
-      child: new RenderSizedBox(
-        desiredSize: new sky.Size.fromHeight(100.0),
+      child: new RenderConstrainedBox(
+        additionalConstraints: new BoxConstraints.tightFor(height: 100.0),
         child: new RenderDecoratedBox(
           decoration: new BoxDecoration(
             backgroundColor: new sky.Color(0xFFFFFF00)
           )
         )
       )
     ),
     new RenderPadding(
       padding: new EdgeDims.all(10.0),
-      child: new RenderSizedBox(
-        desiredSize: new sky.Size.fromHeight(100.0),
+      child: new RenderConstrainedBox(
+        additionalConstraints: new BoxConstraints.tightFor(height: 100.0),
         child: new RenderDecoratedBox(
           decoration: new BoxDecoration(
             border: new Border(
               top: new BorderSide(color: new sky.Color(0xFFF00000), width: 5.0),
               right: new BorderSide(color: new sky.Color(0xFFFF9000), width: 10.0),
               bottom: new BorderSide(color: new sky.Color(0xFFFFF000), width: 15.0),
               left: new BorderSide(color: new sky.Color(0xFF00FF00), width: 20.0)
             ),
             backgroundColor: new sky.Color(0xFFDDDDDD)
           )
         )
       )
     ),
     new RenderPadding(
       padding: new EdgeDims.all(10.0),
-      child: new RenderSizedBox(
-        desiredSize: new sky.Size.fromHeight(100.0),
+      child: new RenderConstrainedBox(
+        additionalConstraints: new BoxConstraints.tightFor(height: 100.0),
         child: new RenderDecoratedBox(
           decoration: new BoxDecoration(
             backgroundColor: new sky.Color(0xFFFFFF00)
           )
         )
       )
     ),
     new RenderPadding(
       padding: new EdgeDims.all(10.0),
-      child: new RenderSizedBox(
-        desiredSize: new sky.Size.fromHeight(100.0),
+      child: new RenderConstrainedBox(
+        additionalConstraints: new BoxConstraints.tightFor(height: 100.0),
         child: new RenderDecoratedBox(
           decoration: new BoxDecoration(
             backgroundColor: new sky.Color(0xFFFFFF00)
           )
         )
       )
     ),
     new RenderPadding(
       padding: new EdgeDims.all(10.0),
-      child: new RenderSizedBox(
-        desiredSize: new sky.Size.fromHeight(100.0),
+      child: new RenderConstrainedBox(
+        additionalConstraints: new BoxConstraints.tightFor(height: 100.0),
         child: new RenderDecoratedBox(
           decoration: new BoxDecoration(
             backgroundColor: new sky.Color(0xFFFFFF00)
           )
         )
       )
     ),
   ]);
   app = new AppView(root: root);
 }