Rename widgets/wrappers.dart to widgets/basic.dart

sky/sdk/lib/framework/widgets/checkbox.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/theme2/colors.dart' as colors;
 
 import '../animation/animated_value.dart';
 import '../animation/curves.dart';
 import '../rendering/box.dart';
 import 'animated_component.dart';
-import 'wrappers.dart';
+import 'basic.dart';
 
 typedef void ValueChanged(value);
 
 const double _kMidpoint = 0.5;
 const double _kCheckDuration = 200.0;
 const sky.Color _kUncheckedColor = const sky.Color(0x8A000000);
 // TODO(jackson): This should change colors with the theme
 sky.Color _kCheckedColor = colors.Purple[500];
 const double _kEdgeSize = 20.0;
 const double _kEdgeRadius = 1.0;
@@ skipping 102 matching lines @@
               canvas.drawPath(path, paint);
             }
           }
         )
       ),
       onGestureTap: _handleClick
     );
   }
 
 }