Remove uses of unittest in the HTML tests where possible.

pkg/dev_compiler/test/codegen/lib/html/query_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 QueryTest;
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
 import 'dart:html';
 
+import 'package:expect/minitest.dart';
+
 main() {
-  useHtmlConfiguration();
-
   final div = new DivElement();
   final canvas = new CanvasElement(width: 200, height: 200);
   canvas.id = 'testcanvas';
   final element =
       new Element.html("<div><br/><img/><input/><img/></div>");
   document.body.nodes.addAll([div, canvas,  element]);
-  
+
   var isCanvasElement =
       predicate((x) => x is CanvasElement, 'is a CanvasElement');
   var isImageElement =
       predicate((x) => x is ImageElement, 'is an ImageElement');
 
   test('query', () {
       Element e = query('#testcanvas');
       expect(e, isNotNull);
       expect(e.id, 'testcanvas');
       expect(e, isCanvasElement);
@@ skipping 10 matching lines @@
       expect(l.length, 1);
       expect(l[0], canvas);
     });
 
 
   test('queryAll (Multiple)', () {
       List l = queryAll('img');
       expect(l.length, 2);
       expect(l[0], isImageElement);
       expect(l[1], isImageElement);
-      expect(l[0], isNot(equals(l[1])));
+      expect(l[0] == l[1], isFalse);
     });
 
   test('queryAll (None)', () {
       List l = queryAll('video');
       expect(l.isEmpty, isTrue);
     });
 }