Enable presubmit pylint in build/android.

build/android/pylib/flag_changer.py

 # 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.
 
-import constants
 import logging
-import traceback
 
 
 class FlagChanger(object):
   """Changes the flags Chrome runs with.
 
   There are two different use cases for this file:
   * Flags are permanently set by calling Set().
   * Flags can be temporarily set for a particular set of unit tests.  These
     tests should call Restore() to revert the flags to their original state
     once the tests have completed.
@@ skipping 88 matching lines @@
       assert len(file_contents) == 1 and file_contents[0] == cmd_line, (
           'Failed to set the command line file at %s' % self._cmdline_file)
     else:
       if use_root:
         self._adb.RunShellCommandWithSU('rm ' + self._cmdline_file)
       else:
         self._adb.RunShellCommand('rm ' + self._cmdline_file)
       assert not self._adb.FileExistsOnDevice(self._cmdline_file), (
           'Failed to remove the command line file at %s' % self._cmdline_file)
 
-  def _TokenizeFlags(self, line):
+  @staticmethod
+  def _TokenizeFlags(line):
     """Changes the string containing the command line into a list of flags.
 
     Follows similar logic to CommandLine.java::tokenizeQuotedArguments:
     * Flags are split using whitespace, unless the whitespace is within a
       pair of quotation marks.
     * Unlike the Java version, we keep the quotation marks around switch
       values since we need them to re-create the file when new flags are
       appended.
 
     Args:
@@ skipping 26 matching lines @@
 
     # Tack on the last flag.
     if not current_flag:
       if within_quotations:
         logging.warn('Unterminated quoted argument: ' + line)
     else:
       tokenized_flags.append(current_flag)
 
     # Return everything but the program name.
     return tokenized_flags[1:]