Fix obj-c tests.

src/objective-c/tests/CronetTests/CoreCronetEnd2EndTests.mm

@@ -82,7 +82,8 @@ static void cronet_init_client_secure_fullstack(grpc_end2end_test_fixture *f,
                                                 grpc_channel_args *client_args,
                                                 stream_engine *cronetEngine) {
   fullstack_secure_fixture_data *ffd = (fullstack_secure_fixture_data *)f->fixture_data;
-  f->client = grpc_cronet_secure_channel_create(cronetEngine, ffd->localaddr, client_args, NULL);
+  f->client =
+      grpc_cronet_secure_channel_create(cronetEngine, ffd->localaddr.get(), client_args, NULL);
   GPR_ASSERT(f->client != NULL);
 }
 
@@ -95,7 +96,7 @@ static void chttp2_init_server_secure_fullstack(grpc_end2end_test_fixture *f,
   }
   f->server = grpc_server_create(server_args, NULL);
   grpc_server_register_completion_queue(f->server, f->cq, NULL);
-  GPR_ASSERT(grpc_server_add_secure_http2_port(f->server, ffd->localaddr, server_creds));
+  GPR_ASSERT(grpc_server_add_secure_http2_port(f->server, ffd->localaddr.get(), server_creds));
   grpc_server_credentials_release(server_creds);
   grpc_server_start(f->server);
 }