Build nacl_helper_nonsfi with GN

ppapi/nacl_irt/irt_pnacl_translator_compile.cc

 // Copyright 2015 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.
 
 #include <argz.h>
 #include <string.h>
 
+#include "build/build_config.h"
 #include "native_client/src/shared/platform/nacl_log.h"
 #include "native_client/src/shared/srpc/nacl_srpc.h"
 #include "native_client/src/untrusted/irt/irt_dev.h"
 #include "ppapi/nacl_irt/irt_interfaces.h"
 
+#if !defined(OS_NACL_NONSFI)
+
 namespace {
 
 const int kMaxObjectFiles = 16;
 
 const struct nacl_irt_pnacl_compile_funcs* g_funcs;
 
 void StreamInitWithSplit(NaClSrpcRpc* rpc,
                          NaClSrpcArg** in_args,
                          NaClSrpcArg** out_args,
                          NaClSrpcClosure* done) {
@@ skipping 85 matching lines @@
     NaClLog(LOG_FATAL, "NaClSrpcAcceptClientConnection() failed\n");
   }
 }
 
 }
 
 const struct nacl_irt_private_pnacl_translator_compile
     nacl_irt_private_pnacl_translator_compile = {
   ServeTranslateRequest
 };
+
+#endif  // !defined(OS_NACL_NONSFI)