Enable presubmit pylint in build/android.

build/android/install_emulator_deps.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.
 
 """Installs deps for using SDK emulator for testing.
 
 The script will download the SDK and system images, if they are not present, and
 install and enable KVM, if virtualization has been enabled in the BIOS.
 """
@@ skipping 213 matching lines @@
 
 
 def main(argv):
   opt_parser = optparse.OptionParser(
       description='Install dependencies for running the Android emulator')
   opt_parser.add_option('--api-level', dest='api_level',
       help='The API level (e.g., 19 for Android 4.4) to ensure is available',
       type='int', default=DEFAULT_ANDROID_API_LEVEL)
   opt_parser.add_option('-v', dest='verbose', action='store_true',
       help='enable verbose logging')
-  options, _ = opt_parser.parse_args(argv[1:])
+  options, _args = opt_parser.parse_args(argv[1:])
 
   # run_tests_helper will set logging to INFO or DEBUG
   # We achieve verbose output by configuring it with 2 (==DEBUG)
   verbosity = 1
   if (options.verbose):
     verbosity = 2
   logging.basicConfig(level=logging.INFO,
                       format='# %(asctime)-15s: %(message)s')
   run_tests_helper.SetLogLevel(verbose_count=verbosity)
 
@@ skipping 21 matching lines @@
 
   # Make sure KVM packages are installed and enabled.
   if CheckKVM():
     logging.info('KVM already installed and enabled.')
   else:
     InstallKVM()
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))