Adding support checks for partially supported element types and updating tests.

tests/html/element_webkit_test.dart

 // Copyright (c) 2011, 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 ElementWebKitTest;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_config.dart';
 import 'dart:html';
 
 
 // NOTE:
 // These should ALL be webkit-specific items
 // Ideally all of these should be functional on all browsers and moved into
 // element_test.dart.
 
-void testConstructorHelper(String tag, String htmlSnippet,
-    String expectedText, Function isExpectedClass) {
-  expect(isExpectedClass(new Element.tag(tag)), true);
-  final elementFromSnippet = new Element.html(htmlSnippet);
-  expect(isExpectedClass(elementFromSnippet), true);
-  expect(expectedText, elementFromSnippet.text);
-}
-
 void testEventHelper(EventListenerList listenerList, type,
     [Function registerOnEventListener = null]) {
   bool firedWhenAddedToListenerList = false;
   bool firedOnEvent = false;
   listenerList.add((e) {
     firedWhenAddedToListenerList = true;
   });
   if (registerOnEventListener != null) {
     registerOnEventListener((e) {
       firedOnEvent = true;
     });
   }
 
   final event = new Event(type);
   listenerList.dispatch(event);
 
   expect(firedWhenAddedToListenerList, isTrue);
   if (registerOnEventListener != null) {
     expect(firedOnEvent, isTrue);
   }
 }
 
 main() {
   useHtmlConfiguration();
 
-  group('constructors', () {
-    test('details', () => testConstructorHelper('details',
-        '<details>foo</details>', 'foo',
-        (element) => element is DetailsElement));
-    test('embed', () => testConstructorHelper('embed',
-        '<embed>foo</embed>', '',
-        (element) => element is EmbedElement));
-    test('keygen', () => testConstructorHelper('keygen', '<keygen>', '',
-        (element) => element is KeygenElement));
-    test('marquee', () => testConstructorHelper('marquee',
-        '<marquee>foo</marquee>', 'foo',
-        (element) => element is MarqueeElement));
-    test('meter', () => testConstructorHelper('meter',
-        '<meter>foo</meter>', 'foo',
-        (element) => element is MeterElement));
-    test('object', () => testConstructorHelper('object',
-        '<object>foo</object>', 'foo',
-        (element) => element is ObjectElement));
-    });
 
   group('events', () {
     final element = new Element.tag('div');
     final on = element.on;
     testEventHelper(on.transitionEnd, 'webkitTransitionEnd');
     testEventHelper(on.fullscreenChange, 'webkitfullscreenchange',
         (listener) => Testing.addEventListener(element,
             'webkitfullscreenchange', listener, true));
   });
 }