Rename Container's desiredSize argument to width and height arguments.

sky/sdk/lib/framework/fn2.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 'app.dart';
 import 'dart:async';
 import 'dart:collection';
 import 'dart:mirrors';
@@ skipping 390 matching lines @@
     super.syncRenderObject(old);
     root.decoration = decoration;
   }
 }
 
 class SizedBox extends OneChildRenderObjectWrapper {
   RenderSizedBox root;
   final Size desiredSize;
 
   SizedBox({
-    this.desiredSize: sky.Size.infinite,
+    double width: double.INFINITY,
+    double height: double.INFINITY,
     UINode child,
     Object key
-  }) : super(child: child, key: key);
+  }) : desiredSize = new Size(width, height), super(child: child, key: key);
 
   RenderSizedBox createNode() => new RenderSizedBox(desiredSize: desiredSize);
 
   void syncRenderObject(SizedBox old) {
     super.syncRenderObject(old);
     root.desiredSize = desiredSize;
   }
 }
 
 class ConstrainedBox extends OneChildRenderObjectWrapper {
@@ skipping 526 matching lines @@
   UINode build();
 }
 
 class Container extends Component {
   final UINode child;
   final BoxConstraints constraints;
   final BoxDecoration decoration;
   final EdgeDims margin;
   final EdgeDims padding;
   final Matrix4 transform;
-  final Size desiredSize;
+  final double width;
+  final double height;
 
   Container({
     Object key,
     this.child,
     this.constraints,
     this.decoration,
-    this.desiredSize,
+    this.width,
+    this.height,
     this.margin,
     this.padding,
     this.transform
   }) : super(key: key);
 
   UINode build() {
     UINode current = child;
 
+    if (child == null && width == null && height == null)
+      current = new SizedBox();
+
     if (padding != null)
       current = new Padding(padding: padding, child: current);
 
     if (decoration != null)
       current = new DecoratedBox(decoration: decoration, child: current);
 
-    if (desiredSize != null)
-      current = new SizedBox(desiredSize: desiredSize, child: current);
+    if (width != null || height != null)
+      current = new SizedBox(
+        width: width == null ? double.INFINITY : width,
+        height: height == null ? double.INFINITY : height,
+        child: current
+      );
 
     if (constraints != null)
       current = new ConstrainedBox(constraints: constraints, child: current);
 
     if (margin != null)
       current = new Padding(padding: margin, child: current);
 
     if (transform != null)
       current = new Transform(transform: transform, child: current);
 
-    if (current == null)
-      current = new SizedBox();
-
     return current;
   }
 }
 
 class _AppView extends AppView {
   _AppView() : super(null);
 
   void dispatchEvent(sky.Event event, HitTestResult result) {
     super.dispatchEvent(event, result);
 
@@ skipping 28 matching lines @@
     assert(root.parent is RenderView);
   }
 }
 
 class Text extends Component {
   Text(this.data) : super(key: '*text*');
   final String data;
   bool get interchangeable => true;
   UINode build() => new Paragraph(text: data);
 }