Update Chomium's build files to work w/ latest GN binaries.

remoting/resources/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.
 
 import("//tools/grit/grit_rule.gni")
 
 # See also remoting_locales_with_underscores below.
 remoting_locales = [
   "am",
   "ar",
@@ skipping 185 matching lines @@
             remoting_locales_with_underscores,
             [ "$root_build_dir/remoting/resources/{{source_name_part}}.lproj/locale.pak" ])
   } else {
     outputs = process_file_template(
             remoting_locales,
             [ "$root_build_dir/remoting_locales/{{source_name_part}}.pak" ])
   }
 
   args = [
            "-p",
-           os,
+           current_os,
            "-g",
            rebase_path(root_gen_dir, root_build_dir),
            "-x",
            rebase_path(root_out_dir, root_build_dir),
          ] + remoting_locales
 
   deps = [
     ":strings",
   ]
 }