Adding validation that Custom element constructor has zero args

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';
 import 'dart:js' as js;
 import '../utils.dart';
@@ skipping 129 matching lines @@
 
     expect(ErrorConstructorElement.callCount, 1);
 
     var e = dummy.firstChild;
     // Accessing should not re-run the constructor.
     expect(ErrorConstructorElement.callCount, 1);
     expect(e is HtmlElement, isTrue);
     expect(e is ErrorConstructorElement, isFalse);
   });
 
+  test('cannot register created with params', () {
+    expect(() {
+      document.register('x-created-with-params', CreatedWithParametersElement);
+    }, throws);
+  });
+
   test('created cannot be called from nested constructor',
       NestedCreatedConstructorElement.test);
 
 
   // 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
 }
 
 
 class NestedElement extends HtmlElement {
@@ skipping 106 matching lines @@
     expectGlobalError(() {
       e = new Element.tag(tag);
     });
     expect(e is NestedCreatedConstructorElement, isFalse);
     expect(e is HtmlElement, isTrue);
     // Should not have been set.
     expect(constructedB, isNull);
   }
 }
 
+class CreatedWithParametersElement extends HtmlElement {
+  CreatedWithParametersElement.created(ignoredParam) : super.created();
+}
+
 void expectGlobalError(Function test) {
   js.context['testExpectsGlobalError'] = true;
   try {
     test();
   } catch(e) {
     rethrow;
   } finally {
     js.context['testExpectsGlobalError'] = false;
   }
   var errors = js.context['testSuppressedGlobalErrors'];
   expect(errors['length'], 1);
   // Clear out the errors;
   js.context['testSuppressedGlobalErrors']['length'] = 0;
 }