update custom elements and shadow dom

pkg/unittest/lib/html_config.dart

Index: pkg/unittest/lib/html_config.dart
diff --git a/pkg/unittest/lib/html_config.dart b/pkg/unittest/lib/html_config.dart
index 464030520c29c9f269f83078fd76636d87252d5a..93f17d8692d4098460f37cb3b992e4e78c35ea0d 100644
--- a/pkg/unittest/lib/html_config.dart
+++ b/pkg/unittest/lib/html_config.dart
@@ -166,7 +166,8 @@ class HtmlConfiguration extends SimpleConfiguration {
 
   void onDone(bool success) {
     _uninstallHandlers();
-    window.postMessage('unittest-suite-done', '*');

[Jennifer Messerly, 2014/01/27 19:44:31]

Without this fix, test failures were showing up as "PASS" in dev tools, and
producing a warning at the command line that the test emitted "PASS" and "FAIL".
They were correctly recorded as a failure, though.

+    var msg = success ? 'unittest-suite-done' : 'unittest-suite-fail';
+    window.postMessage(msg, '*');
   }
 }