Mojo: Add PRESUBMIT.py to mojo/.

mojo/public/tools/bindings/pylib/mojom_tests/parse/lexer_unittest.py

 # Copyright 2014 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 imp
 import os.path
 import sys
 import unittest
 
-# Disable lint check for finding modules:
-# pylint: disable=F0401
-
 def _GetDirAbove(dirname):
   """Returns the directory "above" this file containing |dirname| (which must
   also be "above" this file)."""
   path = os.path.abspath(__file__)
   while True:
     path, tail = os.path.split(path)
     assert tail
     if tail == dirname:
       return path
 
@@ skipping 153 matching lines @@
   def _SingleTokenForInput(self, input_string):
     """Gets the single token for the given input string. (Raises an exception if
     the input string does not result in exactly one token.)"""
     toks = self._TokensForInput(input_string)
     assert len(toks) == 1
     return toks[0]
 
 
 if __name__ == "__main__":
   unittest.main()