Make RunApplication() return a MojoResult and TerminateApplication() take one.

services/test_service/test_request_tracker_application.cc

Index: services/test_service/test_request_tracker_application.cc
diff --git a/services/test_service/test_request_tracker_application.cc b/services/test_service/test_request_tracker_application.cc
index 2c41f76883853008e12dfe8f02e8c2718e871d0e..9a0f6122416713b0a5d32f597f9bd103a980b6c6 100644
--- a/services/test_service/test_request_tracker_application.cc
+++ b/services/test_service/test_request_tracker_application.cc
@@ -43,6 +43,5 @@ bool TestRequestTrackerApplication::OnAcceptConnection(
 
 MojoResult MojoMain(MojoHandle application_request) {
   mojo::test::TestRequestTrackerApplication app;
-  mojo::RunApplication(application_request, &app);
-  return MOJO_RESULT_OK;
+  return mojo::RunApplication(application_request, &app);
 }