Removing custom element preload test.

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 CustomMixin {
@@ skipping 65 matching lines @@
       }, throws, reason: 'Cannot register a native element.');
     });
 
     test('register non-element', () {
       expect(() {
         document.register(nextTag, NotAnElement);
       }, throws, reason: 'Cannot register a non-element.');
     });
   });
 
+  // TODO(vsm): Modify this test once we agree on the proper semantics.
+  /*
   group('preregister', () {
-    // TODO(vsm): Modify this test once we agree on the proper semantics.
+
     test('pre-registration construction', () {
       var tag = nextTag;
       var dom = new Element.html('<div><$tag></$tag></div>');
       var preElement = dom.children[0];
       expect(preElement, isNotNull);
       expect(preElement is HtmlElement, isTrue);
       expect(preElement is CustomType, isFalse);
       var firedOnPre = false;
       preElement.onFocus.listen((_) {
         firedOnPre = true;
@@ skipping 13 matching lines @@
 
       var firedOnPost = false;
       postElement.onFocus.listen((_) {
         firedOnPost = true;
       });
       // Event handlers persist on old and new element.
       postElement.dispatchEvent(new Event('focus'));
       expect(firedOnPre, isTrue);
       expect(firedOnPost, isTrue);
     });
-  });
+  });*/
 
   group('innerHtml', () {
     test('query', () {
       var tag = nextTag;
       document.register(tag, CustomType);
       var element = new DivElement();
       element.innerHtml = '<$tag></$tag>';
       document.body.nodes.add(element);
       var queried = query(tag);
 
@@ skipping 32 matching lines @@
     test('can invoke mixin methods', () {
       var tag = nextTag;
       document.register(tag, CustomType);
 
       var element = new Element.tag(tag);
       element.invokeMixinMethod();
       expect(element.mixinMethodCalled, isTrue);
     });
   });
 }