Enable presubmit pylint in build/android.

build/android/gyp/dex.py

 #!/usr/bin/env python
 #
 # Copyright 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 optparse
 import os
 import sys
 
+# pylint: disable=F0401
 from util import build_utils
 from util import md5_check
+# pylint: enable=F0401
 
 
 def DoDex(options, paths):
   dx_binary = os.path.join(options.android_sdk_tools, 'dx')
   # See http://crbug.com/272064 for context on --force-jumbo.
   dex_cmd = [dx_binary, '--dex', '--force-jumbo', '--output', options.dex_path]
   if options.no_locals != '0':
     dex_cmd.append('--no-locals')
   dex_cmd += paths
 
   record_path = '%s.md5.stamp' % options.dex_path
   md5_check.CallAndRecordIfStale(
       lambda: build_utils.CheckOutput(dex_cmd, print_stderr=False),
       record_path=record_path,
       input_paths=paths,
       input_strings=dex_cmd)
 
   build_utils.Touch(options.dex_path)
 
 
-def main(argv):
+def main():
   parser = optparse.OptionParser()
   parser.add_option('--android-sdk-tools',
                     help='Android sdk build tools directory.')
   parser.add_option('--dex-path', help='Dex output path.')
   parser.add_option('--configuration-name',
                     help='The build CONFIGURATION_NAME.')
   parser.add_option('--proguard-enabled',
                     help='"true" if proguard is enabled.')
   parser.add_option('--proguard-enabled-input-path',
                     help=('Path to dex in Release mode when proguard '
@@ skipping 11 matching lines @@
       and options.configuration_name == 'Release'):
     paths = [options.proguard_enabled_input_path]
 
   DoDex(options, paths)
 
   if options.stamp:
     build_utils.Touch(options.stamp)
 
 
 if __name__ == '__main__':
-  sys.exit(main(sys.argv))
+  sys.exit(main())