Mojo: Add PRESUBMIT.py to mojo/.

mojo/public/tools/bindings/pylib/mojom_tests/parse/ast_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 106 matching lines @@
     self.assertEquals(nodelist3.items, [node1, node2])
     self.assertEquals(nodelist3, nodelist1)
     self.assertEquals(nodelist3, nodelist2)
     self.assertEquals(nodelist3.lineno, 1)
 
     # Test iteration:
     i = 1
     for item in nodelist1:
       self.assertEquals(item.value, i)
       i += 1