Let's hide double.INFINITY a bit more, by providing cleaner APIs for the cases where we're currentl…

sky/home.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';
 
 import 'package:mojom/intents/intents.mojom.dart';
 import 'package:sky/framework/shell.dart' as shell;
 import 'package:sky/theme/colors.dart' as colors;
 import 'package:sky/theme/edges.dart';
@@ skipping 21 matching lines @@
   String href;
 
   SkyDemo(String text, this.href) : this.text = text, super(key: text);
 
   void _handlePress() {
     launch(href);
   }
 
   Widget build() {
     return new ConstrainedBox(
-      // TOOD(ianh): Fix so we don't need INFINITY here.
-      constraints: new BoxConstraints.tightFor(width: double.INFINITY),
+      constraints: const BoxConstraints.expandWidth(),
       child: new RaisedButton(
         child: new Text(text),
         onPressed: _handlePress
       )
     );
   }
 }
 
 class SkyHome extends App {
   Widget build() {
@@ skipping 25 matching lines @@
           justifyContent: FlexJustifyContent.spaceAround
         )
       )
     );
   }
 }
 
 void main() {
   runApp(new SkyHome());
 }