Rename UINode to Widget.

sky/sdk/lib/widgets/radio.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 '../rendering/object.dart';
 import '../theme2/colors.dart' as colors;
 import 'basic.dart';
 import 'button_base.dart';
@@ skipping 13 matching lines @@
   Object groupValue;
   ValueChanged onChanged;
 
   void syncFields(Radio source) {
     value = source.value;
     groupValue = source.groupValue;
     onChanged = source.onChanged;
     super.syncFields(source);
   }
 
-  UINode buildContent() {
+  Widget buildContent() {
     // TODO(jackson): This should change colors with the theme
     Color color = highlight ? colors.Purple[500] : const Color(0x8A000000);
     const double kDiameter = 16.0;
     const double kOuterRadius = kDiameter / 2;
     const double kInnerRadius = 5.0;
     return new EventListenerNode(
       new Container(
         margin: const EdgeDims.symmetric(horizontal: 5.0),
         width: kDiameter,
         height: kDiameter,
@@ skipping 17 matching lines @@
       ),
       onGestureTap: _handleClick
     );
   }
 
   void _handleClick(_) {
     onChanged(value);
   }
 
 }