Make gn check //mojo/public/* pass

mojo/public/cpp/application/BUILD.gn

 # 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.
 
 # GYP version: mojo/mojo_public.gypi:mojo_application_base
 source_set("application") {
   sources = [
     "application_connection.h",
     "application_delegate.h",
     "application_impl.h",
     "connect.h",
     "service_provider_impl.h",
     "interface_factory.h",
     "interface_factory_impl.h",
     "lib/application_connection.cc",
     "lib/application_delegate.cc",
     "lib/application_impl.cc",
     "lib/service_provider_impl.cc",
     "lib/service_connector.cc",
     "lib/service_connector.h",
     "lib/service_registry.cc",
     "lib/service_registry.h",
     "lib/weak_service_provider.cc",
     "lib/weak_service_provider.h",
   ]
 
   deps = [
     "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/environment",
+    "//mojo/public/cpp/system",
     "//mojo/public/interfaces/application",
   ]
 }
 
 # GYP version: mojo/mojo_public.gypi:mojo_application_standalone
 source_set("standalone") {
   sources = [
     "lib/application_runner.cc"
   ]
 
+  public_deps = [ ":application" ]
+
   deps = [
-    ":application",
     "//mojo/public/cpp/environment:standalone",
+    "//mojo/public/cpp/utility",
   ]
 }