Fix lint error in git_wktry.

git_wktry.py

 #!/usr/bin/python
 # Copyright (c) 2013 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.
 """Wrapper for trychange.py for WebKit changes."""
 
 import errno
 import logging
 import os
 import sys
 import tempfile
 
 import git_cl
 from scm import GIT
 import trychange
 
 
 class ScopedTemporaryFile(object):
   def __init__(self, **kwargs):
     file_handle, self._path = tempfile.mkstemp(**kwargs)
     os.close(file_handle)
 
   def __enter__(self):
     return self._path
 
-  def __exit__(self, type, value, traceback):
+  def __exit__(self, _exc_type, _exc_value, _exc_traceback):
     try:
       os.remove(self._path)
     except OSError, e:
       if e.errno != errno.ENOENT:
         raise e
 
 
 def generateDiff(path_to_write, chromium_src_root):
   """Create the diff file to send to the try server. We prepend the WebKit
   revision to the beginning of the diff so we can patch against ToT or other
@@ skipping 40 matching lines @@
     args.extend(argv)
     cl = git_cl.Changelist()
     change = cl.GetChange(cl.GetUpstreamBranch(), None)
     logging.getLogger().handlers = []
     return trychange.TryChange(args, change,
         swallow_exception=False, prog='git wktry')
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))