Docserver: Only fetch content versions in the crons, not their contents.

chrome/common/extensions/docs/server2/redirector.py

 # Copyright 2013 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 posixpath
 from urlparse import urlsplit
 
 from file_system import FileNotFoundError
-from future import Future
+from future import All
 from path_util import Segment, Join, SplitParent
 
 class Redirector(object):
   def __init__(self, compiled_fs_factory, file_system):
     self._file_system = file_system
     self._cache = compiled_fs_factory.ForJson(file_system)
 
   def Redirect(self, host, path):
     ''' Check if a path should be redirected, first according to host
     redirection rules, then from rules in redirects.json files.
@@ skipping 81 matching lines @@
       path.pop(0)
 
     return 'https://developer.chrome.com/' + posixpath.join(*path)
 
   def Cron(self):
     ''' Load files during a cron run.
     '''
     futures = []
     for root, dirs, files in self._file_system.Walk(''):
       if 'redirects.json' in files:
-        futures.append(
-            self._cache.GetFromFile(posixpath.join(root, 'redirects.json')))
-    return Future(callback=lambda: [f.Get() for f in futures])
+        futures.append(self._cache.GetFromFile(Join(root, 'redirects.json')))
+    return All(futures)