Fixes for 32-bit official GN build.

components/nacl/BUILD.gn

 # Copyright (c) 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.
 
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 if (enable_nacl) {
@@ skipping 251 matching lines @@
       }
 
       if (use_seccomp_bpf) {
         defines += [ "USE_SECCOMP_BPF" ]
       }
     }
   }
 } else {
   group("nacl") {
   }
+  group("nacl_helper") {
+  }
 }
 
 source_set("nacl_switches") {
   sources = [
     "common/nacl_switches.cc",
     "common/nacl_switches.h",
   ]
 }
 
 source_set("nacl_common") {
@@ skipping 30 matching lines @@
 
   if (is_linux) {
     sources += [
       "common/nacl_paths.cc",
       "common/nacl_paths.h",
     ]
 
     defines = [ "__STDC_LIMIT_MACROS=1" ]
   }
 }