Automatically generate most constructors

client/dom/generated/src/interface/Worker.dart

 // 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.
 
 // WARNING: Do not edit - generated code.
 
-interface Worker extends AbstractWorker {
+interface Worker extends AbstractWorker default _WorkerFactoryProvider {
+
+  Worker(String scriptUrl);
 
   void postMessage(Dynamic message, [List messagePorts]);
 
   void terminate();
 
   void webkitPostMessage(Dynamic message, [List messagePorts]);
 }