Add option to allow mojob to specify extra gn args.

mojo/tools/mojob.py

Index: mojo/tools/mojob.py
diff --git a/mojo/tools/mojob.py b/mojo/tools/mojob.py
index 7f60900656af4c6251c0fde73c841b9bdae25b0c..817632842ef30bedac1217df5aa280bacf3fb83d 100755
--- a/mojo/tools/mojob.py
+++ b/mojo/tools/mojob.py
@@ -64,6 +64,9 @@ def _args_to_config(args):
   if 'test_results_server' in args:
     additional_args['test_results_server'] = args.test_results_server
 
+  if 'extra_args' in args:
+    additional_args['extra_args'] = args.extra_args

[qsr, 2015/03/10 10:02:38]

Could you use gn_args instead of extra_args?

[haltonhuo, 2015/03/11 05:58:06]

Done.

+
   return Config(target_os=target_os, target_cpu=target_cpu,
                 is_debug=args.debug, dcheck_always_on=args.dcheck_always_on,
                 **additional_args)
@@ -215,6 +218,8 @@ def main():
   gn_parser = subparsers.add_parser('gn', parents=[parent_parser],
                                     help='Run gn for mojo (does not sync).')
   gn_parser.set_defaults(func=gn)
+  gn_parser.add_argument('--args', help='Specify extra args',
+                         default=None, dest='extra_args')
   clang_group = gn_parser.add_mutually_exclusive_group()
   clang_group.add_argument('--clang', help='Use Clang (default)', default=None,
                            action='store_true')