Force 'git cl upload' in push-to-trunk forced mode.

tools/push-to-trunk/push_to_trunk.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 439 matching lines @@
     if self._options and self._options.r:
       print "Using account %s for review." % self._options.r
       rev = self._options.r
     else:
       print "Please enter the email address of a reviewer for the roll CL: ",
       self.DieInForcedMode("A reviewer must be specified in forced mode.")
       rev = self.ReadLine()
     args = "commit -am \"Update V8 to version %s.\n\nTBR=%s\"" % (ver, rev)
     if self.Git(args) is None:
       self.Die("'git commit' failed.")
-    if self.Git("cl upload --send-mail", pipe=False) is None:
+    force_flag = " -f" if self._options.f else ""
+    if self.Git("cl upload --send-mail%s" % force_flag, pipe=False) is None:
       self.Die("'git cl upload' failed, please try again.")
     print "CL uploaded."
 
 
 class SwitchV8(Step):
   def __init__(self):
     Step.__init__(self, "Returning to V8 checkout.", requires="chrome_path")
 
   def RunStep(self):
     self.RestoreIfUnset("v8_path")
@@ skipping 89 matching lines @@
 def Main():
   parser = BuildOptions()
   (options, args) = parser.parse_args()
   if not ProcessOptions(options):
     parser.print_help()
     return 1
   RunPushToTrunk(CONFIG, options)
 
 if __name__ == "__main__":
   sys.exit(Main())