In "pylint: disable=" comments in webkitpy, use symbolic names.

third_party/WebKit/Tools/Scripts/webkitpy/common/system/executive_mock.py

 # Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #    * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #    * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 80 matching lines @@
         return running_pids
 
     def command_for_printing(self, args):
         string_args = map(unicode, args)
         return " ".join(string_args)
 
     def run_command(self,
                     args,
                     cwd=None,
                     input=None,
-                    # pylint: disable=W0613
-                    # unused argument
+                    # pylint: disable=unused-argument
                     timeout_seconds=None,
                     error_handler=None,
                     return_exit_code=False,
                     return_stderr=True,
                     decode_output=False,
                     env=None,
                     debug_logging=False):
 
         self.calls.append(args)
 
@@ skipping 86 matching lines @@
                     error_handler=None,
                     return_exit_code=False,
                     return_stderr=True,
                     decode_output=False,
                     env=None,
                     debug_logging=False):
         self.calls.append(args)
         assert isinstance(args, list) or isinstance(args, tuple)
         assert all(isinstance(arg, basestring) for arg in args)
         if self._exception:
-            raise self._exception  # pylint: disable=E0702
+            raise self._exception  # pylint: disable=raising-bad-type
         if self._run_command_fn:
             return self._run_command_fn(args)
         if return_exit_code:
             return self._exit_code
         if self._exit_code and error_handler:
             script_error = ScriptError(script_args=args, exit_code=self._exit_code, output=self._output)
             error_handler(script_error)
         if return_stderr:
             return self._output + self._stderr
         return self._output