[Findit] Factoring the gitiles (etc) stuff out into its own directory

appengine/findit/gitiles/test/git_repository_test.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 base64
 from datetime import datetime
 import json
 import re
 
 from testing_utils import testing
 
-from common import git_repository
+from gitiles import git_repository
+from gitiles.change_log import ChangeLog
+# TODO(wrengr): we shouldn't have anything in the gitiles directory
+# depend on stuff in the common directory.
 from common import retry_http_client
-from common.change_log import ChangeLog
 
 
 COMMIT_MESSAGE = ('Add popover for snapshot canvas log.\n\n'
                   'Review URL: https://codereview.chromium.org/320423004\n\n'
                   'Review URL: https://codereview.chromium.org/328113005\n\n'
                   'Cr-Commit-Position: refs/heads/master@{#175976}')
 
 COMMIT_LOG = """)]}'
 {
   "commit": "bcfd5a12eea05588aee98b7cf7e032d8cb5b58bb",
@@ skipping 534 matching lines @@
         return {'log': [log2]}
 
       return {'log': [log1], 'next': 'next_page_commit'}
 
     self.mock(git_repository.GitRepository, '_SendRequestForJsonResponse',
               _MockSendRequestForJsonResponse)
 
     changelogs = self.git_repo.GetChangeLogs('0', '2')
 
     self.assertEqual(len(changelogs), 2)