Start cleaning up the HTML tests.

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

Index: pkg/dev_compiler/test/codegen/lib/html/element_dimensions_test.dart
diff --git a/pkg/dev_compiler/test/codegen/lib/html/element_dimensions_test.dart b/pkg/dev_compiler/test/codegen/lib/html/element_dimensions_test.dart
index 413d302a68388288506398d541872ca7e616c3dd..75e158f87800aa0e504d18df9013905e81817419 100644
--- a/pkg/dev_compiler/test/codegen/lib/html/element_dimensions_test.dart
+++ b/pkg/dev_compiler/test/codegen/lib/html/element_dimensions_test.dart
@@ -2,14 +2,11 @@
 // 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_dimensions_test;
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
 import 'dart:html';
 
-main() {
-  useHtmlConfiguration();
+import 'package:minitest/minitest.dart';
 
+main() {
   var isElement = predicate((x) => x is Element, 'is an Element');
   var isCanvasElement =
       predicate((x) => x is CanvasElement, 'is a CanvasElement');