roll "common" DEPS, and replace tools/pyutils with it

gm/rebaseline_server/server.py

 #!/usr/bin/python
 
 """
 Copyright 2013 Google Inc.
 
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 
 HTTP server for our HTML rebaseline viewer.
 """
@@ skipping 13 matching lines @@
 import threading
 import time
 import urlparse
 
 # Must fix up PYTHONPATH before importing from within Skia
 # pylint: disable=W0611
 import fix_pythonpath
 # pylint: enable=W0611
 
 # Imports from within Skia
-from pyutils import gs_utils
+from py.utils import gs_utils
 import gm_json
 
 # Imports from local dir
 #
 # pylint: disable=C0301
 # Note: we import results under a different name, to avoid confusion with the
 # Server.results() property. See discussion at
 # https://codereview.chromium.org/195943004/diff/1/gm/rebaseline_server/server.py#newcode44
 # pylint: enable=C0301
 import compare_configs
@@ skipping 655 matching lines @@
                    json_filename=args.json_filename,
                    gm_summaries_bucket=args.gm_summaries_bucket,
                    port=args.port, export=args.export, editable=args.editable,
                    reload_seconds=args.reload, config_pairs=config_pairs,
                    builder_regex_list=args.builders)
   _SERVER.run()
 
 
 if __name__ == '__main__':
   main()