Delete JSEchoTest.ShareEchoService -- it tests the wrong-way ServiceProvider (exposed_services).

services/js/test/echo.js

 #!mojo mojo:js_content_handler
 // 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("main", [
   "mojo/services/public/js/application",
   "services/js/test/echo_service.mojom",
 ], function(application, echoServiceMojom) {
 
   const Application = application.Application;
   const EchoService = echoServiceMojom.EchoService;
   var echoApp;
 
   class EchoServiceImpl {
     echoString(s) {
       return Promise.resolve({value: s});
     }
 
-    // This method is only used by the ShareEchoService test.
-    shareEchoService() {
-      var echoTargetURL = echoApp.url.replace("echo.js", "echo_target.js");
-      var targetSP = echoApp.shell.connectToApplication(echoTargetURL);
-      // This Promise resolves after echo_target.js has called the echoString()
-      // method defined on the local EchoService implementation. For its part,
-      // the target application quits after one successful call to echoString().
-      return new Promise(function(resolve) {
-        targetSP.provideService(EchoService, function() {
-          this.echoString = function(s) {
-            resolve({ok: true});
-            return Promise.resolve({value: s});
-          }
-        });
-      });
-    }
-
     quit() {
       echoApp.quit();
     }
   }
 
   class Echo extends Application {
     acceptConnection(url, serviceExchange) {
       echoApp = this;
       serviceExchange.provideService(EchoService, EchoServiceImpl);
     }
   }
 
   return Echo;
 });