Add an ApplicationConnector.Duplicate().

mojo/public/interfaces/application/application_connector.mojom

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [DartPackage="mojo"]
 module mojo;
 
 import "mojo/public/interfaces/application/service_provider.mojom";
 
 interface ApplicationConnector {
@@ skipping 16 matching lines @@
   // At least one of |services| or |exposed_services| should be valid/bound in
   // the call.
   //
   // If the |application_url| does not contain a domain, but is of the form
   // "mojo:{service}", it is up to the Mojo shell to select an appropriate
   // application for the service. Currently, the shell does this based on the
   // value of its --origin flag.
   ConnectToApplication(string application_url,
                        ServiceProvider&? services,
                        ServiceProvider? exposed_services);
+
+  // Creates a duplicate of this |ApplicationConnector|.
+  Duplicate(ApplicationConnector& application_connector_request);
 };