update elements and fix some bugs

test/iron_localstorage_basic_test.dart

 // Copyright (c) 2015, 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.
 @TestOn('browser')
 library polymer_elements.test.iron_localstorage_basic_test;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:html';
 import 'dart:js';
+import 'package:polymer/polymer.dart';
 import 'package:polymer_elements/iron_localstorage.dart';
 import 'package:test/test.dart';
 import 'package:web_components/web_components.dart';
 import 'common.dart';
 
 main() async {
-  await initWebComponents();
+  await initPolymer();
   IronLocalstorage storage;
 
   group('basic', () {
     setUp(() {
       window.localStorage['iron-localstorage-test'] = '{"foo":"bar"}';
       storage = fixture('fixture');
       storage.jsElement.callMethod('flushDebouncer', ['reload']);
     });
 
     tearDown(() {
       window.localStorage.remove('iron-localstorage-test');
     });
 
     test('load', () {
       expect(storage.value, isNotNull);
       expect(storage.value['foo'], 'bar');
     });
 
     test('save', () {
       var newValue = {'foo': 'zot'};
       storage.value = newValue;
-      storage.jsElement.callMethod('flushDebouncer', ['save']);
+      storage.flushDebouncer('save');
       var v = window.localStorage[storage.name];
       v = JSON.decode(v);
       expect(v['foo'], newValue['foo']);
     });
 
     test('delete', () {
       storage.value = null;
-      storage.jsElement.callMethod('flushDebouncer', ['save']);
+      storage.flushDebouncer('save');
       var v = window.localStorage[storage.name];
       expect(v, isNull);
     });
 
     test('event iron-localstorage-load', () {
       var done = new Completer();
       var ls = document.createElement('iron-localstorage');
       ls.on['iron-localstorage-load'].take(1).listen((_) {
         done.complete();
       });
       ls.name = 'iron-localstorage-test';
       return done.future;
     });
 
     test('event iron-localstorage-load-empty', () {
       var done = new Completer();
       window.localStorage.remove('iron-localstorage-test');
       IronLocalstorage ls = document.createElement('iron-localstorage');
       ls.on['iron-localstorage-load-empty'].take(1).listen((_) {
         // testing recommended way to initialize localstorage
         ls.value = "Yo";
-        ls.jsElement.callMethod('flushDebouncer', ['save']);
+        ls.flushDebouncer('save');
         expect(
             "Yo", JSON.decode(window.localStorage['iron-localstorage-test']));
         done.complete();
       });
       ls.name = 'iron-localstorage-test';
       return done.future;
     });
 
     test('auto-save sub-properties', () {
-      var t = new JsObject.fromBrowserObject(
-          document.querySelector('#boundTemplate'));
+      DomBind t = document.querySelector('#boundTemplate');
       var ls = document.querySelector('#boundLocal') as IronLocalstorage;
       var value = new JsObject.jsify({'foo': 'FOO', 'bar': 'BAR'});
       t['value'] = value;
       expect('FOO',
           ls.value['foo']); // value has propagated from template to storage
-      ls.jsElement.callMethod('flushDebouncer', ['save']);
+      ls.flushDebouncer('save');
       t['value']['foo'] = "Yo";
-      ls.jsElement.callMethod('flushDebouncer', ['save']);
+      ls.flushDebouncer('save');
       var item = JSON.decode(window.localStorage['iron-localstorage-test']);
       expect('Yo',
           isNot(item['foo'])); // did not propagate because did not use setters
-      t.callMethod('set', ['value.foo', 'BAZ!']);
-      ls.jsElement.callMethod('flushDebouncer', ['save']);
+      t.set('value.foo', 'BAZ!');
+      ls.flushDebouncer('save');
       item = JSON.decode(window.localStorage['iron-localstorage-test']);
       expect('BAZ!', item['foo']); // did propagate
       ls.value = null;
     });
   });
 }