Make it easier to debug examples/widgets/container.dart, since it is currently showing a crazy clip…

sky/sdk/lib/framework/widgets/raised_button.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 '../theme2/edges.dart';
 import '../theme2/colors.dart';
-import '../rendering/flex.dart';
 import 'button_base.dart';
 import 'ink_well.dart';
 import 'material.dart';
 import 'wrappers.dart';
 
 enum RaisedButtonTheme { light, dark }
 
 class RaisedButton extends ButtonBase {
 
   RaisedButton({ Object key, this.child, this.onPressed, this.theme: RaisedButtonTheme.light }) : super(key: key);
@@ skipping 28 matching lines @@
           color: theme == RaisedButtonTheme.light
                                ? (highlight ? Grey[350] : Grey[300])
                                : (highlight ? Blue[700] : Blue[600])
         )
       ),
       onGestureTap: (_) { if (onPressed != null) onPressed(); }
     );
   }
 
 }