Fix options for calling push-to-trunk script.

tools/push-to-trunk/auto_roll.py

 #!/usr/bin/env python
 # Copyright 2013 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
@@ skipping 120 matching lines @@
   def RunStep(self):
     print "Pushing lkgr %s to trunk." % self["lkgr"]
     self.PushTreeStatus("Tree is closed (preparing to push)")
 
     # TODO(machenbach): Update the script before calling it.
     try:
       if self._options.push:
         P = push_to_trunk.PushToTrunk
         self._side_effect_handler.Call(
             P(push_to_trunk.CONFIG, self._side_effect_handler).Run,
-            ["-author", self._options.author,
-             "-reviewer", self._options.reviewer,
-             "-revision", self["lkgr"],
-             "-force"])
+            ["--author", self._options.author,
+             "--reviewer", self._options.reviewer,
+             "--revision", self["lkgr"],
+             "--force"])
     finally:
       self.PushTreeStatus(self["tree_message"])
 
 
 class AutoRoll(ScriptsBase):
   def _PrepareOptions(self, parser):
     parser.add_argument("-c", "--chromium",
                         help=("Deprecated."))
     parser.add_argument("-p", "--push",
                         help="Push to trunk. Dry run if unspecified.",
@@ skipping 14 matching lines @@
       CheckAutoRollSettings,
       CheckTreeStatus,
       FetchLKGR,
       CheckLastPush,
       PushToTrunk,
     ]
 
 
 if __name__ == "__main__":  # pragma: no cover
   sys.exit(AutoRoll(CONFIG).Run())