Support for anonymous state routes

sky/sdk/example/stocks/lib/stock_home.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 'package:sky/editing/input.dart';
 import 'package:sky/animation/animation_performance.dart';
 import 'package:sky/widgets/animated_component.dart';
 import 'package:sky/widgets/animation_builder.dart';
 import 'package:sky/theme/colors.dart' as colors;
 import 'package:sky/widgets/basic.dart';
@@ skipping 39 matching lines @@
     stockMode = source.stockMode;
     modeUpdater = source.modeUpdater;
   }
 
   bool _isSearching = false;
   String _searchQuery;
 
   AnimationBuilder _snackbarTransform;
 
   void _handleSearchBegin() {
-    navigator.pushState("/search", (_) {
+    navigator.pushState(this, (_) {
       setState(() {
         _isSearching = false;
         _searchQuery = null;
       });
     });
     setState(() {
       _isSearching = true;
     });
   }
 
   void _handleSearchEnd() {
-    assert(navigator.currentRoute.name == '/search');
+    assert(navigator.currentRoute.key == this);
     navigator.pop();
-    assert(navigator.currentRoute.name == '/');
     setState(() {
       _isSearching = false;
       _searchQuery = null;
     });
   }
 
   void _handleSearchQueryChanged(String query) {
     setState(() {
       _searchQuery = query;
     });
   }
 
   bool _drawerShowing = false;
   DrawerStatus _drawerStatus = DrawerStatus.inactive;
 
   void _handleOpenDrawer() {
     setState(() {
       _drawerShowing = true;
       _drawerStatus = DrawerStatus.active;
     });
   }
 
   void _handleDrawerStatusChange(DrawerStatus status) {
-    if (status == DrawerStatus.inactive && navigator.currentRoute.name == "/drawer") {
-      navigator.pop();
-    }
     setState(() {
       _drawerStatus = status;
     });
   }
 
   bool _menuShowing = false;
   PopupMenuStatus _menuStatus = PopupMenuStatus.inactive;
 
   void _handleMenuShow() {
     setState(() {
@@ skipping 212 matching lines @@
         body: buildTabNavigator(),
         snackBar: buildSnackBar(),
         floatingActionButton: buildFloatingActionButton(),
         drawer: buildDrawer()
       ),
     ];
     addMenuToOverlays(overlays);
     return new Stack(overlays);
   }
 }