Modify and enable formerly disabled test.

tests/html/node_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('NodeTest');
 #import('../../pkg/unittest/unittest.dart');
 #import('../../pkg/unittest/html_config.dart');
 #import('dart:html');
 
 Node makeNode() => new Element.tag('div');
 Node makeNodeWithChildren() =>
   new Element.html("<div>Foo<br/><!--baz--></div>");
 
 main() {
   useHtmlConfiguration();
 
   test('replaceWith', () {
     final node = makeNodeWithChildren();
     final subnode = node.nodes[1];
     final out = subnode.replaceWith(new Text('Bar'));
     Expect.equals(subnode, out, '#replaceWith should be chainable');
     Expect.equals(3, node.nodes.length);
     Expect.isTrue(node.nodes[0] is Text);
     Expect.equals('Foo', node.nodes[0].text);
     Expect.isTrue(node.nodes[1] is Text);
     Expect.equals('Bar', node.nodes[1].text);
     Expect.isTrue(node.nodes[2] is Comment);
   });
 
-  if (false) // TODO(antonm): fix it.
   test('remove', () {
     final node = makeNodeWithChildren();
     final subnode = node.nodes[1];
     final out = subnode.remove();
-    Expect.equals(subnode, out, '#remove should be chainable');
+    Expect.isNull(out);
     Expect.equals(2, node.nodes.length);
     Expect.isTrue(node.nodes[0] is Text);
     Expect.isTrue(node.nodes[1] is Comment);
   });
 
   test('contains', () {
     final Node node = new Element.html("<div>Foo<span>Bar</span></div>");
     Expect.isTrue(node.contains(node.nodes.first));
     Expect.isTrue(node.contains(node.nodes[1].nodes.first));
     Expect.isFalse(node.contains(new Text('Foo')));
@@ skipping 142 matching lines @@
     });
 
     test('getRange', () {
       var range = makeNodeList().getRange(1, 2);
       Expect.isTrue(range is List<Node>);
       Expect.isTrue(range[0] is BRElement);
       Expect.isTrue(range[1] is Comment);
     });
   });
 }