Revert "Removing ElementList (splitting out removing NodeList into a separate CL)."

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');
@@ skipping 154 matching lines @@
       Expect.equals(1, node.nodes.length);
     });
 
     test('getRange', () {
       var node = makeNodeWithChildren();
       Expect.isTrue(node.nodes.getRange(1, 2) is NodeList);
     });
   });
 
   group('_NodeList', () {
-    List<Node> makeNodeList() =>
+    NodeList makeNodeList() =>
       makeNodeWithChildren().nodes.filter((_) => true);
 
     test('first', () {
       var nodes = makeNodeList();
       Expect.isTrue(nodes.first is Text);
     });
 
     test('filter', () {
       var filtered = makeNodeList().filter((n) => n is BRElement);
       Expect.equals(1, filtered.length);
       Expect.isTrue(filtered[0] is BRElement);
       Expect.isTrue(filtered is NodeList);
     });
 
     test('getRange', () {
       var range = makeNodeList().getRange(1, 2);
       Expect.isTrue(range is NodeList);
       Expect.isTrue(range[0] is BRElement);
       Expect.isTrue(range[1] is Comment);
     });
   });
 }