[Findit] Re-org code.

appengine/findit/lib/gitiles/test/gitiles_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
 
-# TODO(http://crbug.com/660474): Nothing in ./lib should depend on things
-# in ./common
-from common import retry_http_client
 from lib.gitiles import gitiles_repository
 from lib.gitiles.change_log import ChangeLog
+from libs.http import retry_http_client
 
 
 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 445 matching lines @@
     changelogs = self.git_repo.GetChangeLogs('0', '2')
 
     self.assertEqual(len(changelogs), 2)
 
   def testGetWrappedGitRepositoryClass(self):
     repo = gitiles_repository.GitilesRepository(
         'http://repo_url', HttpClientForGit())
 
     self.assertEqual(repo.repo_url, 'http://repo_url')
     self.assertTrue(isinstance(repo.http_client, HttpClientForGit))