Implement automatically generated constructors for frog and dartium dart:html

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

Index: client/dom/templates/html/frog/factoryprovider.darttemplate
diff --git a/client/dom/templates/html/frog/factoryprovider.darttemplate b/client/dom/templates/html/frog/factoryprovider.darttemplate
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+++ b/client/dom/templates/html/frog/factoryprovider.darttemplate
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+// 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 $CONSTRUCTOR($PARAMETERS) native
+      '''return new $NAMEDCONSTRUCTOR($ARGUMENTS);''';
+}