Re-introduce the _dispatchEvent function in lib/html/src/Isolates.dart.

lib/html/src/Isolates.dart

Index: lib/html/src/Isolates.dart
diff --git a/lib/html/src/Isolates.dart b/lib/html/src/Isolates.dart
new file mode 100644
index 0000000000000000000000000000000000000000..3ad8c438c6adc75e78f368ef12bc3692845d475d
--- /dev/null
+++ b/lib/html/src/Isolates.dart
@@ -0,0 +1,9 @@
+// Copyright (c) 2012, 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.
+
+void _dispatchEvent(String receiver, var message) {
+  var event = document.$dom_createEvent('TextEvent');
+  event.initTextEvent(receiver, false, false, window, JSON.stringify(message));
+  window.$dom_dispatchEvent(event);
+}