Allow non-primitive-value dictionaries to be passed to constructors for html

tools/dom/templates/html/dart2js/impl_Notification.darttemplate

+// Copyright (c) 2013, 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.
+
+part of $LIBRARYNAME;
+
+/// @domName $DOMNAME; @docsEditable true$ANNOTATIONS

[blois, 2013/02/11 17:24:33]

Only ANNOTATIONS, no comments.

+class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
+  factory $CLASSNAME(String title, [Map options]) {
+    if (?options) {
+      return JS('Notification', 'new Notification(#,#)', title,
+          convertDartToNative_SerializedScriptValue(options));
+    } else {
+      return JS('Notification', 'new Notification(#)', title);
+    }
+  }
+$!MEMBERS
+}