Clean up a bunch of our Dart code.

sky/sdk/lib/framework/components2/drawer.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 '../animation/animated_value.dart';
 import '../animation/curves.dart';
 import '../fn2.dart';
 import '../theme2/colors.dart';
 import '../theme2/shadows.dart';
 import 'animated_component.dart';
@@ skipping 71 matching lines @@
     if (velocityX < _kMinFlingVelocity)
       return;
 
     double targetPosition = direction < 0.0 ? -_kWidth : 0.0;
     double distance = (targetPosition - position.value).abs();
     double duration = distance / velocityX;
 
     if (distance > 0)
       position.animateTo(targetPosition, duration, curve: linear);
   }
+
 }
 
 class Drawer extends AnimatedComponent {
-  List<UINode> children;
-  int level;
-  DrawerController controller;
-
-  double _position;
 
   Drawer({
     Object key,
     this.controller,
     this.children,
     this.level: 0
   }) : super(key: key) {
     animate(controller.position, (double value) {
       _position = value;
     });
   }
 
+  List<UINode> children;
+  int level;
+  DrawerController controller;
+
+  double _position;
+
   UINode build() {
     Matrix4 transform = new Matrix4.identity();
     transform.translate(_position);
 
     double scaler = _position / _kWidth + 1;
     Color maskColor = new Color.fromARGB((0x7F * scaler).floor(), 0, 0, 0);
 
     var mask = new EventListenerNode(
       new Container(decoration: new BoxDecoration(backgroundColor: maskColor)),
       onGestureTap: controller.handleMaskTap,
@@ skipping 12 matching lines @@
     return new EventListenerNode(
       new StackContainer(
         children: [ mask, content ]
       ),
       onPointerDown: controller.handlePointerDown,
       onPointerMove: controller.handlePointerMove,
       onPointerUp: controller.handlePointerUp,
       onPointerCancel: controller.handlePointerCancel
     );
   }
+
 }