Changing onCreated callback to created.

tests/html/custom/created_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 created_callback_test;
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_config.dart';
 import 'dart:html';
 
 class A extends HtmlElement {
   static final tag = 'x-a';
   factory A() => new Element.tag(tag);
 
   static int createdInvocations = 0;
 
-  void onCreated() {
+  void created() {
     createdInvocations++;
   }
 }
 
 class B extends HtmlElement {
   static final tag = 'x-b';
   factory B() => new Element.tag(tag);
 }
 
 class C extends HtmlElement {
   static final tag = 'x-c';
   factory C() => new Element.tag(tag);
 
   static int createdInvocations = 0;
   static var div;
 
-  void onCreated() {
+  void created() {
     createdInvocations++;
 
     if (this.id != 'u') {
       return;
     }
 
     var t = div.query('#t');
     var v = div.query('#v');
     var w = div.query('#w');
 
@@ skipping 34 matching lines @@
 <x-b id="w"></x-b>
 """;
 
     expect(C.createdInvocations, 2);
     expect(div.query('#w') is B, isTrue);
   });
 
   // TODO(vsm): Port additional test from upstream here:
   // http://src.chromium.org/viewvc/blink/trunk/LayoutTests/fast/dom/custom/created-callback.html?r1=156141&r2=156185
 }