Move mojom definitions of URL{Request,Response} into SDK

services/js/test/network_test.js

 #!mojo mojo:js_content_handler
 
 define("main", [
-  "mojo/services/public/js/application",
+  "mojo/public/interfaces/network/url_request.mojom",
   "mojo/public/js/core",
   "mojo/services/network/public/interfaces/network_service.mojom",
-  "mojo/services/network/public/interfaces/url_loader.mojom",
+  "mojo/services/public/js/application",
   "services/js/test/network_test_service.mojom",
-], function(application,
+], function(urlRequestMojom,
             core,
             networkServiceMojom,
-            urlLoaderMojom,
+            application,
             networkTestServiceMojom) {
 
   const Application = application.Application;
   const NetworkService = networkServiceMojom.NetworkService;
-  const URLRequest = urlLoaderMojom.URLRequest;
+  const URLRequest = urlRequestMojom.URLRequest;
   const NetworkTestService = networkTestServiceMojom.NetworkTestService;
 
   class NetworkTestServiceImpl {
     constructor(app) {
       this.app = app;
       var netService = app.shell.connectToService(
           "mojo:network_service", NetworkService);
       var urlLoader;
       netService.createURLLoader(function(x){urlLoader = x;});
       this.urlLoader = urlLoader;
@@ skipping 26 matching lines @@
   class NetworkTest extends Application {
     acceptConnection(url, serviceExchange) {
       serviceExchange.provideService(
           NetworkTestService,
           NetworkTestServiceImpl.bind(null, this));
     }
   }
 
   return NetworkTest;
 });