mojo: Update PRESBUMIT.py

mojo/python/tests/messaging_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 unittest
 
 import mojo_unittest
+from mojo.bindings import messaging
 
-# pylint: disable=F0401
-from mojo.bindings import messaging
+# pylint: disable=E0611
 from mojo import system
 
 
 class _ForwardingConnectionErrorHandler(messaging.ConnectionErrorHandler):
 
   def __init__(self, callback):
+    messaging.ConnectionErrorHandler.__init__(self)
     self._callback = callback
 
   def OnError(self, result):
     self._callback(result)
 
 
 class ConnectorTest(mojo_unittest.MojoTestCase):
 
   def setUp(self):
     super(ConnectorTest, self).setUp()
@@ skipping 170 matching lines @@
     self.assertNotEquals(message_header.request_id, 0)
     response_header_data = messaging.MessageHeader(
         0,
         messaging.MESSAGE_IS_RESPONSE_FLAG,
         message_header.request_id).Serialize()
     self.handle.WriteMessage(response_header_data)
     self.loop.RunUntilIdle()
     self.assertFalse(self.received_errors)
     self.assertEquals(len(back_messages), 1)
     self.assertEquals(back_messages[0].data, response_header_data)