Implement automatically generated constructors for frog and dartium dart:html

client/dom/templates/html/frog/factoryprovider_SharedWorker.darttemplate

Index: client/dom/templates/html/frog/factoryprovider_SharedWorker.darttemplate
diff --git a/client/dom/templates/html/frog/factoryprovider_SharedWorker.darttemplate b/client/dom/templates/html/frog/factoryprovider_SharedWorker.darttemplate
new file mode 100644
index 0000000000000000000000000000000000000000..b88db0cc3e8e36889d8d790527518f2ca588e20a
--- /dev/null
+++ b/client/dom/templates/html/frog/factoryprovider_SharedWorker.darttemplate
@@ -0,0 +1,11 @@
+// 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.
+
+class $FACTORYPROVIDER {
+  factory SharedWorker(String scriptURL, [String name]) native
+'''
+if (name == null) return new SharedWorker(scriptURL);
+return new SharedWorker(scriptURL, name);
+''';
+}