[chromedriver] Fix typo in android chromedriver buildbot script.

build/android/buildbot/bb_device_steps.py

 #!/usr/bin/env python
 # Copyright (c) 2013 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.
 
 import collections
 import glob
 import hashlib
 import multiprocessing
 import os
@@ skipping 132 matching lines @@
 
 def RunChromeDriverTests(options):
   """Run all the steps for running chromedriver tests."""
   bb_annotations.PrintNamedStep('chromedriver_annotation')
   RunCmd(['chrome/test/chromedriver/run_buildbot_steps.py',
           '--android-packages=%s,%s,%s' %
            (constants.PACKAGE_INFO['chromium_test_shell'].package,
             constants.PACKAGE_INFO['chrome_stable'].package,
             constants.PACKAGE_INFO['chrome_beta'].package),
           '--revision=%s' % _GetRevision(options),
-          '--update_log'])
+          '--update-log'])
 
 def InstallApk(options, test, print_step=False):
   """Install an apk to all phones.
 
   Args:
     options: options object
     test: An I_TEST namedtuple
     print_step: Print a buildbot step
   """
   if print_step:
@@ skipping 334 matching lines @@
   setattr(options, 'target', options.factory_properties.get('target', 'Debug'))
   if options.coverage_bucket:
     setattr(options, 'coverage_dir',
             os.path.join(CHROME_OUT_DIR, options.target, 'coverage'))
 
   MainTestWrapper(options)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))