Removed dependency on pytz

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 pytz
 import shutil
 import subprocess
 import sys
 import tempfile
 
 
 from testing_support.git.schema import GitRepoSchema
 
 
 class GitRepo(object):
@@ skipping 41 matching lines @@
     """Makes new GitRepo.
 
     Automatically creates a temp folder under GitRepo.BASE_TEMP_DIR. It's
     recommended that you clean this repo up by calling nuke() on it, but if not,
     GitRepo will automatically clean up all allocated repos at the exit of the
     program (assuming a normal exit like with sys.exit)
 
     Args:
       schema - An instance of GitRepoSchema
     """
+    class UTC(datetime.tzinfo):
+      def utcoffset(self, dt): return datetime.timedelta(0)
+
     self.repo_path = tempfile.mkdtemp(dir=self.BASE_TEMP_DIR)
     self.commit_map = {}
-    self._date = datetime.datetime(1970, 1, 1, tzinfo=pytz.utc)
+    self._date = datetime.datetime(1970, 1, 1, tzinfo=UTC())
 
     self.to_schema_refs = ['--branches']
 
     self.git('init')
     self.git('config', 'user.name', 'testcase')
     self.git('config', 'user.email', 'testcase@example.com')
     for commit in schema.walk():
       self._add_schema_commit(commit, schema.data_for(commit.name))
       self.last_commit = self[commit.name]
     if schema.master:
@@ skipping 146 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