Finally get rid of depot_tools' breakpad.

trychange.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """Client-side script to send a try job to the try server. It communicates to
 the try server by either writting to a svn/git repository or by directly
 connecting to the server by HTTP.
 """
 
 import contextlib
 import datetime
 import errno
 import getpass
 import itertools
 import json
 import logging
 import optparse
 import os
 import posixpath
 import re
 import shutil
 import sys
 import tempfile
 import urllib
 import urllib2
 import urlparse
 
-import breakpad  # pylint: disable=W0611
-
 import fix_encoding
 import gcl
 import gclient_utils
 import gerrit_util
 import scm
 import subprocess2
 
 
 __version__ = '1.2'
 
@@ skipping 1217 matching lines @@
     return 1
   except (gclient_utils.Error, subprocess2.CalledProcessError), e:
     print >> sys.stderr, e
     return 1
   return 0
 
 
 if __name__ == "__main__":
   fix_encoding.fix_encoding()
   sys.exit(TryChange(None, None, False))