Update Button to be made of Material

sky/framework/components/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/curves.dart';
 import '../animation/generator.dart';
 import '../fn.dart';
 import '../theme/colors.dart';
 import '../theme/shadows.dart';
 import 'dart:async';
 import 'dart:math' as math;
 import 'dart:sky' as sky;
+import 'material.dart';
 
 const double _kWidth = 256.0;
 const double _kMinFlingVelocity = 0.4;
 const double _kBaseSettleDurationMS = 246.0;
 const double _kMaxSettleDurationMS = 600.0;
 const Cubic _kAnimationCurve = easeOut;
 
 class DrawerAnimation extends Animation {
   Stream<double> get onPositionChanged => onValueChanged;
 
@@ skipping 53 matching lines @@
   }
 }
 
 class Drawer extends Component {
   static final Style _style = new Style('''
     position: absolute;
     z-index: 2;
     top: 0;
     left: 0;
     bottom: 0;
-    right: 0;
-    box-shadpw: ${Shadow[3]};'''
+    right: 0;'''
   );
 
   static final Style _maskStyle = new Style('''
     background-color: black;
     will-change: opacity;
     position: absolute;
     top: 0;
     left: 0;
     bottom: 0;
     right: 0;'''
   );
 
   static final Style _contentStyle = new Style('''
     background-color: ${Grey[50]};
     will-change: transform;
     position: absolute;
     z-index: 3;
     width: 256px;
     top: 0;
     left: 0;
     bottom: 0;'''
   );
 
   DrawerAnimation animation;
   List<Node> children;
+  int level;
 
   Drawer({
     Object key,
     this.animation,
-    this.children
+    this.children,
+    this.level: 0
   }) : super(key: key) {
     events.listen('pointerdown', animation.handlePointerDown);
     events.listen('pointermove', animation.handlePointerMove);
     events.listen('pointerup', animation.handlePointerUp);
     events.listen('pointercancel', animation.handlePointerCancel);
   }
 
   double _position = -_kWidth;
 
   bool _listening = false;
@@ skipping 13 matching lines @@
   Node build() {
     _ensureListening();
 
     bool isClosed = _position <= -_kWidth;
     String inlineStyle = 'display: ${isClosed ? 'none' : ''}';
     String maskInlineStyle = 'opacity: ${(_position / _kWidth + 1) * 0.25}';
     String contentInlineStyle = 'transform: translateX(${_position}px)';
 
     Container mask = new Container(
       key: 'Mask',
-      style: _maskStyle,
+      styles: [_maskStyle],
       inlineStyle: maskInlineStyle
     )..events.listen('gesturetap', animation.handleMaskTap)
      ..events.listen('gestureflingstart', animation.handleFlingStart);
 
-    Container content = new Container(
+    Material content = new Material(
       key: 'Content',
-      style: _contentStyle,
+      styles: [_contentStyle],
       inlineStyle: contentInlineStyle,
-      children: children
+      children: children,
+      level: level
     );
 
     return new Container(
-      style: _style,
+      styles: [_style],
       inlineStyle: inlineStyle,
       children: [ mask, content ]
     );
   }
 }