Wrapping leaf nodes in non polymer elements

runtime/observatory/tests/observatory_ui/helpers/webcomponents.dart

Index: runtime/observatory/tests/observatory_ui/helpers/webcomponents.dart
diff --git a/tests/compiler/dart2js/serialization/analysis2_test.dart b/runtime/observatory/tests/observatory_ui/helpers/webcomponents.dart
similarity index 51%
copy from tests/compiler/dart2js/serialization/analysis2_test.dart
copy to runtime/observatory/tests/observatory_ui/helpers/webcomponents.dart
index b13a6a366532d50714c23712dc1c2e4b66fdd4e3..c0c4f87cf1211eb1440c74711230450604b8d83a 100644
--- a/tests/compiler/dart2js/serialization/analysis2_test.dart
+++ b/runtime/observatory/tests/observatory_ui/helpers/webcomponents.dart
@@ -1,12 +1,11 @@
 // Copyright (c) 2016, 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.
+import 'dart:html';
 
-library dart2js.serialization.analysis2_test;
-
-import 'analysis_test_helper.dart' as test;
-import 'test_data.dart';
-
-main() {
-  test.main(['${TESTS.length ~/ 2}']);
+loadWebComponents() async {
+  ScriptElement shim = new ScriptElement()
+    ..src = 'packages/web_components/webcomponents.js';
+  document.head.children.add(shim);
+  await shim.onLoad.first;
 }