A few additional fixes for infra refactoring in testing_support

testing_support/git/repo.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 atexit
 import collections
 import datetime
 import os
 import shutil
 import subprocess
@@ skipping 22 matching lines @@
     * AUTHOR_NAME
     * AUTHOR_EMAIL
     * AUTHOR_DATE - must be a datetime.datetime instance
     * COMMITTER_NAME
     * COMMITTER_EMAIL
     * COMMITTER_DATE - must be a datetime.datetime instance
 
   For file content, if 'data' is None, then this commit will `git rm` that file.
   """
   BASE_TEMP_DIR = tempfile.mkdtemp(suffix='base', prefix='git_repo')
-  atexit.register(shutil.rmtree, BASE_TEMP_DIR)
 
   # Singleton objects to specify specific data in a commit dictionary.
   AUTHOR_NAME = object()
   AUTHOR_EMAIL = object()
   AUTHOR_DATE = object()
   COMMITTER_NAME = object()
   COMMITTER_EMAIL = object()
   COMMITTER_DATE = object()
 
   DEFAULT_AUTHOR_NAME = 'Author McAuthorly'
@@ skipping 176 matching lines @@
       else:
         assert current is not None
         hash_to_msg[current] = line
         ret.add_partial(line)
         for parent in parents:
           ret.add_partial(line, hash_to_msg[parent])
         current = None
         parents = []
     assert current is None
     return ret