Rename Date to DateTime.

pkg/serialization/test/serialization_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library serialization_test;
 
 import 'dart:json' as json;
 import 'package:unittest/unittest.dart';
 import 'package:serialization/serialization.dart';
 import 'package:serialization/src/serialization_helpers.dart';
@@ skipping 111 matching lines @@
       ..addRuleFor(stream,
           constructorFields: ['_collection']);
     var state = states(stream, s).first;
     // Define names for the variable offsets to make this more readable.
     var _collection = 0, position = 1;
     expect(state[_collection],[3,4,5]);
     expect(state[position], 2);
   });
 
   test('date', () {
-    var date = new Date.now();
+    var date = new DateTime.now();
     var s = new Serialization()
         ..addRuleFor(date,
             constructorFields : ["year", "month", "day", "hour", "minute",
                                  "second", "millisecond", "isUtc"])
             .configureForMaps();
     var state = states(date, s).first;
     expect(state["year"],date.year);
     expect(state["isUtc"],date.isUtc);
     expect(state["millisecond"], date.millisecond);
   });
@@ skipping 425 matching lines @@
 /** A hard-coded rule for serializing Node instances. */
 class NodeRule extends CustomRule {
   bool appliesTo(instance, _) => instance.runtimeType == Node;
   getState(instance) => [instance.parent, instance.name, instance.children];
   create(state) => new Node(state[1]);
   setState(Node node, state) {
     node.parent = state[0];
     node.children = state[2];
   }
 }