Extract a Connector interface from Shell that can be cloned & passed to other threads

content/test/data/web_ui_mojo_shell_test.js

 // 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.
 
 
 /**
  * This URL is defined in content/public/test/test_mojo_app.cc. It identifies
  * content_shell's out-of-process Mojo test app.
  */
 var TEST_APP_URL = 'system:content_mojo_test';
@@ skipping 12 matching lines @@
     var pipe = core.createMessagePipe();
     var service = new iface.proxyClass(new router.Router(pipe.handle0));
     serviceProvider.getInterface(iface.name, pipe.handle1);
     return service;
   };
 
   return function() {
     domAutomationController.setAutomationId(0);
     var shellPipe = serviceRegistry.connectToService(shellMojom.Shell.name);
     var shell = new shellMojom.Shell.proxyClass(new router.Router(shellPipe));
-    shell.connect(TEST_APP_URL, 1,
+
+    var pipe = core.createMessagePipe();
+    var connector =
+        new shellMojom.Connector.proxyClass(new router.Router(pipe.handle0));
+    shell.getConnector(pipe.handle1);
+
+    connector.connect(
+        TEST_APP_URL, 1,
         function (services) {
           var test = connectToService(services, testMojom.TestMojoService);
           test.getRequestorURL().then(function(response) {
             domAutomationController.send(
                 response.url == 'chrome://mojo-web-ui/');
           });
         },
         function (exposedServices) {},
         new shellMojom.CapabilityFilter({ filter: new Map([["*", ["*"]]]) }));
   };
 });