reland "rebaseline_server: download actual-results.json files from GCS instead of SVN"

gm/rebaseline_server/compare_rendered_pictures.py

Index: gm/rebaseline_server/compare_rendered_pictures.py
diff --git a/gm/rebaseline_server/compare_rendered_pictures.py b/gm/rebaseline_server/compare_rendered_pictures.py
index 75a80d4de2704afc527c2ad7aa1834ac61f4888d..73d0627ba076bcee10397ab9b4bd93147aa9c29a 100755
--- a/gm/rebaseline_server/compare_rendered_pictures.py
+++ b/gm/rebaseline_server/compare_rendered_pictures.py
@@ -13,26 +13,11 @@ Compare results of two render_pictures runs.
 import logging
 import os
 import re
-import sys
 import time
 
 # Imports from within Skia
-#
-# TODO(epoger): Once we move the create_filepath_url() function out of
-# download_actuals into a shared utility module, we won't need to import
-# download_actuals anymore.
-#
-# We need to add the 'gm' directory, so that we can import gm_json.py within
-# that directory.  That script allows us to parse the actual-results.json file
-# written out by the GM tool.
-# Make sure that the 'gm' dir is in the PYTHONPATH, but add it at the *end*
-# so any dirs that are already in the PYTHONPATH will be preferred.
-PARENT_DIRECTORY = os.path.dirname(os.path.realpath(__file__))
-GM_DIRECTORY = os.path.dirname(PARENT_DIRECTORY)
-TRUNK_DIRECTORY = os.path.dirname(GM_DIRECTORY)
-if GM_DIRECTORY not in sys.path:
-  sys.path.append(GM_DIRECTORY)
-import download_actuals
+import fix_pythonpath  # must do this first
+from pyutils import url_utils
 import gm_json
 import imagediffdb
 import imagepair
@@ -74,7 +59,7 @@ class RenderedPicturesComparisons(results.BaseComparisons):
     self._image_base_url = image_base_url
     self._diff_base_url = (
         diff_base_url or
-        download_actuals.create_filepath_url(generated_images_root))
+        url_utils.create_filepath_url(generated_images_root))
     self._load_result_pairs(actuals_root, subdirs)
     self._timestamp = int(time.time())
     logging.info('Results complete; took %d seconds.' %