Revert of Simplify the initialization of Git objects in Host.

third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_importer.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.
 
 """Fetches a copy of the latest state of a W3C test repository and commits.
 
 If this script is given the argument --auto-update, it will also:
  1. Upload a CL.
  2. Trigger try jobs and wait for them to complete.
  3. Make any changes that are required for new failing tests.
@@ skipping 21 matching lines @@
 POLL_DELAY_SECONDS = 2 * 60
 TIMEOUT_SECONDS = 180 * 60
 
 _log = logging.getLogger(__file__)
 
 
 class TestImporter(object):
 
     def __init__(self, host):
         self.host = host
+        self.host.initialize_scm()
         self.executive = host.executive
         self.fs = host.filesystem
         self.finder = WebKitFinder(self.fs)
         self.verbose = False
         self.git_cl = None
 
     def main(self, argv=None):
         options = self.parse_args(argv)
         self.verbose = options.verbose
         log_level = logging.DEBUG if self.verbose else logging.INFO
@@ skipping 389 matching lines @@
         """Returns a dict mapping source to dest name for layout tests that have been renamed."""
         out = self.check_run(['git', 'diff', 'origin/master', '-M100%', '--diff-filter=R', '--name-status'])
         renamed_tests = {}
         for line in out.splitlines():
             _, source_path, dest_path = line.split()
             source_test = self.finder.layout_test_name(source_path)
             dest_test = self.finder.layout_test_name(dest_path)
             if source_test and dest_test:
                 renamed_tests[source_test] = dest_test
         return renamed_tests