Fixing up WebComponents types & tests

tests/html/element_types_test.dart

 // Copyright (c) 2012, 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 element_types;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 
 main() {
@@ skipping 46 matching lines @@
       expect(OutputElement.supported, true);
     });
   });
 
   group('supported_progress', () {
     test('supported', () {
       expect(ProgressElement.supported, true);
     });
   });
 
+  group('supported_shadow', () {
+    test('supported', () {
+      expect(ShadowElement.supported, true);
+    });
+  });
+
   group('supported_track', () {
     test('supported', () {
       expect(TrackElement.supported, true);
     });
   });
 
   group('constructors', () {
     test('a', () {
       expect((new AnchorElement()) is AnchorElement, true);
     });
@@ skipping 166 matching lines @@
     });
     test('q', () {
       expect((new Element.tag('q')) is QuoteElement, true);
     });
     test('script', () {
       expect((new ScriptElement()) is ScriptElement, true);
     });
     test('select', () {
       expect((new SelectElement()) is SelectElement, true);
     });
+    test('shadow', () {
+      expect((new Element.tag('shadow')) is ShadowElement,
+          ShadowElement.supported);
+    });
     test('source', () {
       expect((new SourceElement()) is SourceElement, true);
     });
     test('span', () {
       expect((new SpanElement()) is SpanElement, true);
     });
     test('style', () {
       expect((new StyleElement()) is StyleElement, true);
     });
     test('table', () {
@@ skipping 28 matching lines @@
       expect((new UListElement()) is UListElement, true);
     });
     test('video', () {
       expect((new VideoElement()) is VideoElement, true);
     });
     test('unknown', () {
       expect((new Element.tag('someunknown')) is UnknownElement, true);
     });;
   });
 }