Convert ConnectToApplication to take a params class

mojo/services/network/udp_socket_apptest.cc

Index: mojo/services/network/udp_socket_apptest.cc
diff --git a/mojo/services/network/udp_socket_apptest.cc b/mojo/services/network/udp_socket_apptest.cc
index 0c92ede974a3b771d9c89d6e7e4a9c96d176357e..d55e32acf7d231d0bfa6bec5282e6c8e8688b546 100644
--- a/mojo/services/network/udp_socket_apptest.cc
+++ b/mojo/services/network/udp_socket_apptest.cc
@@ -321,13 +321,8 @@ class UDPSocketAppTest : public test::ApplicationTestBase {
 
   void SetUp() override {
     ApplicationTestBase::SetUp();
-
-    mojo::URLRequestPtr request(mojo::URLRequest::New());
-    request->url = mojo::String::From("mojo:network_service");
-    scoped_ptr<ApplicationConnection> connection =
-        application_impl()->ConnectToApplication(request.Pass());
-    connection->ConnectToService(&network_service_);
-
+    application_impl()->ConnectToService("mojo:network_service",
+                                         &network_service_);
     network_service_->CreateUDPSocket(GetProxy(&socket_));
   }