Initial Dartium custom element support

tests/html/custom_elements_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 custom_elements_test;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 
 class CustomType extends Element {
+  factory CustomType() => null;
+
   bool onCreatedCalled = false;
   void onCreated() {
     onCreatedCalled = true;
+    customCreatedCount++;
   }
 }
 
+int customCreatedCount = 0;
+
 class NotAnElement {}
 
 main() {
   useHtmlIndividualConfiguration();
 
   group('register', () {
     test('register', () {
       document.register('x-type1', CustomType);
 
       var element = new Element.tag('x-type1');
@@ skipping 61 matching lines @@
       var firedOnPost = false;
       postElement.onFocus.listen((_) {
         firedOnPost = true;
       });
       // Event handlers should not persist to new element.
       postElement.dispatchEvent(new Event('focus'));
       expect(firedOnPre, isFalse);
       expect(firedOnPost, isTrue);
     });
   });
+
+  group('innerHtml', () {
+    test('query', () {
+      document.register('x-type8', CustomType);
+      var element = new DivElement();
+      element.innerHtml = '<x-type8></x-type8>';
+      document.body.nodes.add(element);
+      var queried = query('x-type8');
+
+      expect(queried, isNotNull);
+      expect(queried is CustomType, isTrue);
+      expect(queried.onCreatedCalled, isTrue);
+    });
+  });
+
+  group('lifecycle', () {
+    test('onCreated', () {
+      int oldCount = customCreatedCount;
+
+      document.register('x-type9', CustomType);
+      var element = new DivElement();
+      element.innerHtml = '<x-type9></x-type9>';
+      document.body.nodes.add(element);
+      expect(customCreatedCount, oldCount + 1);
+    });
+  });
 }