Add chromedriver_unittests to masters.

scripts/slave/kill_processes.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """A tool to kill any leftover test processes, executed by buildbot.
 
 Only works on Windows."""
 
 import optparse
@@ skipping 156 matching lines @@
     'midlc.exe',
 
     # Things built by/for Chromium.
     'app_list_unittests.exe',
     'base_unittests.exe',
     'cacheinvalidation_unittests.exe',
     'chrome.exe',
     'chromedriver.exe',
     'chromedriver_tests.exe',
     'chromedriver2_tests.exe',
+    'chromedriver_unittests.exe',
     'chromedriver2_unittests.exe',
     'chrome_frame_helper.exe',
     'chrome_frame_net_tests.exe',
     'chrome_frame_tests.exe',
     'chrome_launcher.exe',
     'chrome_frame_unittests.exe',
     'content_shell.exe',
     'content_shell_crash_service.exe',
     'content_unittests.exe',
     'crash_service.exe',
@@ skipping 69 matching lines @@
   # we exit with an error code if they're not.
   if KillAll(processes, must_die=True):
     return rc
 
   # Some processes were not killed, exit with non-zero status.
   return 1
 
 
 if '__main__' == __name__:
   sys.exit(main())