Enable presubmit pylint in build/android.

build/android/generate_emma_html.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.
 
 """Aggregates EMMA coverage files to produce html output."""
 
 import fnmatch
 import json
 import optparse
 import os
 import sys
-import traceback
 
 from pylib import cmd_helper
 from pylib import constants
 
 
 def _GetFilesWithExt(root_dir, ext):
   """Gets all files with a given extension.
 
   Args:
     root_dir: Directory in which to search for files.
     ext: Extension to look for (including dot)
 
   Returns:
     A list of absolute paths to files that match.
   """
   files = []
   for root, _, filenames in os.walk(root_dir):
     basenames = fnmatch.filter(filenames, '*.' + ext)
     files.extend([os.path.join(root, basename)
                   for basename in basenames])
 
   return files
 
 
-def main(argv):
+def main():
   option_parser = optparse.OptionParser()
   option_parser.add_option('--output', help='HTML output filename.')
   option_parser.add_option('--coverage-dir', default=None,
                            help=('Root of the directory in which to search for '
                                  'coverage data (.ec) files.'))
   option_parser.add_option('--metadata-dir', default=None,
                            help=('Root of the directory in which to search for '
                                  'coverage metadata (.em) files.'))
   option_parser.add_option('--cleanup', action='store_true',
                            help=('If set, removes coverage files generated at '
                                  'runtime.'))
-  options, args = option_parser.parse_args()
+  options, _ = option_parser.parse_args()
 
   if not (options.coverage_dir and options.metadata_dir and options.output):
     option_parser.error('One or more mandatory options are missing.')
 
   coverage_files = _GetFilesWithExt(options.coverage_dir, 'ec')
   metadata_files = _GetFilesWithExt(options.metadata_dir, 'em')
   print 'Found coverage files: %s' % str(coverage_files)
   print 'Found metadata files: %s' % str(metadata_files)
 
   sources = []
@@ skipping 19 matching lines @@
       + input_args + output_args + source_args)
 
   if options.cleanup:
     for f in coverage_files:
       os.remove(f)
 
   return exit_code
 
 
 if __name__ == '__main__':
-  sys.exit(main(sys.argv))
+  sys.exit(main())