Remove uses of unittest in the HTML tests where possible.

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

Index: pkg/dev_compiler/test/codegen/lib/html/streams_test.dart
diff --git a/pkg/dev_compiler/test/codegen/lib/html/streams_test.dart b/pkg/dev_compiler/test/codegen/lib/html/streams_test.dart
index edd77e75567dbf40f85b80aa33d00a0ae8fa55f3..2a43f4ce3f60c3d75a5d4f413f5032b172e55fa9 100644
--- a/pkg/dev_compiler/test/codegen/lib/html/streams_test.dart
+++ b/pkg/dev_compiler/test/codegen/lib/html/streams_test.dart
@@ -1,9 +1,8 @@
-library streams_test;
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
 import 'dart:async';
 import 'dart:html';
 
+import 'package:expect/minitest.dart';
+
 class StreamHelper {
   var _a;
   StreamHelper() {
@@ -22,8 +21,6 @@ class StreamHelper {
 }
 
 main() {
-  useHtmlConfiguration();
-
   test('simple', () {
     var helper = new StreamHelper();