Mojo JS Bindings: Simplify sharing services for content-provided JS applications

mojo/public/js/bindings/connection.js

 // Copyright 2014 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.
 
 define("mojo/public/js/bindings/connection", [
   "mojo/public/js/bindings/connector",
   "mojo/public/js/bindings/router",
 ], function(connector, router) {
 
   function Connection(
       handle, localFactory, remoteFactory, routerFactory, connectorFactory) {
     if (routerFactory === undefined)
       routerFactory = router.Router;
     this.router_ = new routerFactory(handle, connectorFactory);
-    this.remote = new remoteFactory(this.router_);
+    this.remote = remoteFactory && new remoteFactory(this.router_);
     this.local = localFactory && new localFactory(this.remote);
     this.router_.setIncomingReceiver(this.local);
 
     // Validate incoming messages: remote responses and local requests.
     var validateRequest = localFactory && localFactory.prototype.validator;
     var validateResponse = remoteFactory.prototype.validator;
     var payloadValidators = [];
     if (validateRequest)
       payloadValidators.push(validateRequest);
     if (validateResponse)
@@ skipping 23 matching lines @@
                     connector.TestConnector);
   }
 
   TestConnection.prototype = Object.create(Connection.prototype);
 
   var exports = {};
   exports.Connection = Connection;
   exports.TestConnection = TestConnection;
   return exports;
 });