Start cleaning up the HTML tests.

pkg/dev_compiler/test/codegen/lib/html/element_offset_test.dart

Index: pkg/dev_compiler/test/codegen/lib/html/element_offset_test.dart
diff --git a/pkg/dev_compiler/test/codegen/lib/html/element_offset_test.dart b/pkg/dev_compiler/test/codegen/lib/html/element_offset_test.dart
index e7129d0696b376e28808fd341550b4e7e9334b2d..bad914e59a3a547d7cb7c92dcda3259c9e14f946 100644
--- a/pkg/dev_compiler/test/codegen/lib/html/element_offset_test.dart
+++ b/pkg/dev_compiler/test/codegen/lib/html/element_offset_test.dart
@@ -2,14 +2,12 @@
 // 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_offset_test;
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_individual_config.dart';
 import 'dart:async';
 import 'dart:html';
 
+import 'package:minitest/minitest.dart';
+
 main() {
-  useHtmlIndividualConfiguration();
   void initPage() {
     var level1 = new UListElement()
       ..classes.add('level-1')