Build nacl_helper_nonsfi with GN

ppapi/nacl_irt/irt_pnacl_translator_link.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 "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;
 
 int (*g_func)(int nexe_fd,
               const int* obj_file_fds,
               int obj_file_fd_count);
 
 void HandleLinkRequest(NaClSrpcRpc* rpc,
                        NaClSrpcArg** in_args,
@@ skipping 32 matching lines @@
     NaClLog(LOG_FATAL, "NaClSrpcAcceptClientConnection() failed\n");
   }
 }
 
 }
 
 const struct nacl_irt_private_pnacl_translator_link
     nacl_irt_private_pnacl_translator_link = {
   ServeLinkRequest
 };
+
+#endif  // !defined(OS_NACL_NONSFI)