Correctly overwrite author in chromium roll script.

tools/push-to-trunk/test_scripts.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 824 matching lines @@
       Cmd("git status -s -uno", ""),
       Cmd("git checkout -f master", ""),
       Cmd("gclient sync --nohooks", "syncing..."),
       Cmd("git pull", ""),
       Cmd("git fetch origin", ""),
       Cmd("git checkout -b v8-roll-123455", ""),
       Cmd("roll-dep v8 123455", "rolled", cb=WriteDeps),
       Cmd(("git commit -am \"Update V8 to version 3.22.5 "
            "(based on bleeding_edge revision r123454).\n\n"
            "Please reply to the V8 sheriff c_name@chromium.org in "
-           "case of problems.\n\nTBR=c_name@chromium.org\""),
+           "case of problems.\n\nTBR=c_name@chromium.org\" "
+           "--author \"author@chromium.org <author@chromium.org>\""),
           ""),
       Cmd("git cl upload --send-mail --email \"author@chromium.org\" -f", ""),
     ]
     self.Expect(expectations)
 
     args = ["-a", "author@chromium.org", "-c", TEST_CONFIG[CHROMIUM],
             "--sheriff", "--googlers-mapping", googlers_mapping_py,
             "-r", "reviewer@chromium.org"]
     ChromiumRoll(TEST_CONFIG, self).Run(args)
 
@@ skipping 615 matching lines @@
 
 Review URL: https://codereview.chromium.org/83173002
 
 ------------------------------------------------------------------------""")
     self.assertEquals(
 """Prepare push to trunk.  Now working on version 3.23.11.
 
 R=danno@chromium.org
 
 Committed: https://code.google.com/p/v8/source/detail?r=17997""", body)