Start cleaning up the HTML tests.

pkg/dev_compiler/test/codegen/lib/html/element_types_constructors2_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_constructors2_test;
-
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_individual_config.dart';
 import 'dart:html';
 
+import 'package:minitest/minitest.dart';
+
 main() {
-  useHtmlIndividualConfiguration();
-
   check(String name, bool fn(), [bool supported = true]) {
     test(name, () {
       var expectation = supported ? returnsNormally : throws;
       expect(() {
         expect(fn(), isTrue);
       }, expectation);
     });
   }
 
   group('constructors', () {
     check('fieldset', () => new FieldSetElement() is FieldSetElement);
     check('form', () => new FormElement() is FormElement);
     check('head', () => new HeadElement() is HeadElement);
     check('hr', () => new HRElement() is HRElement);
     check('html', () => new HtmlHtmlElement() is HtmlHtmlElement);
     check('h1', () => new HeadingElement.h1() is HeadingElement);
     check('h2', () => new HeadingElement.h2() is HeadingElement);
     check('h3', () => new HeadingElement.h3() is HeadingElement);
     check('h4', () => new HeadingElement.h4() is HeadingElement);
     check('h5', () => new HeadingElement.h5() is HeadingElement);
     check('h6', () => new HeadingElement.h6() is HeadingElement);
     check('iframe', () => new IFrameElement() is IFrameElement);
     check('img', () => new ImageElement() is ImageElement);
     check('input', () => new InputElement() is InputElement);
     check('keygen',
         () => new KeygenElement() is KeygenElement, KeygenElement.supported);
   });
 }