Removing Element.createdCallback

tests/html/custom/attribute_changed_callback_test.dart

 // Copyright (c) 2013, 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 attribute_changed_callback_test;
 
 import 'dart:html';
 import 'dart:js' as js;
 import 'package:unittest/html_individual_config.dart';
 import 'package:unittest/unittest.dart';
 import '../utils.dart';
 
 class A extends HtmlElement {
   static final tag = 'x-a';
   factory A() => new Element.tag(tag);
   A.created() : super.created();
 
   static var attributeChangedInvocations = 0;
 
   void attributeChanged(name, oldValue, newValue) {
     attributeChangedInvocations++;
   }
 }
 
 class B extends HtmlElement {
   static final tag = 'x-b';
   factory B() => new Element.tag(tag);
-  B.created() : super.created();
+  B.created() : super.created() {
+    invocations.add('created');
+  }
 
   static var invocations = [];
 
-  void createdCallback() {
-    invocations.add('created');
-  }
-
   void attributeChanged(name, oldValue, newValue) {
     invocations.add('$name: $oldValue => $newValue');
   }
 }
 
 // Pump custom events polyfill events.
 void customElementsTakeRecords() {
   if (js.context.hasProperty('CustomElements')) {
     js.context['CustomElements'].callMethod('takeRecords');
   }
@@ skipping 59 matching lines @@
 
     test('add, change classes', () {
       var b = new B();
 
       B.invocations = [];
       b.classes.toggle('u');
       expect(B.invocations, ['class: null => u']);
     });
   });
 }