Docserver: there is only one.

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

 # Copyright (c) 2012 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 json
 import logging
 import operator
 
 from appengine_url_fetcher import AppEngineUrlFetcher
 import url_constants
 
 class BranchUtility(object):
   def __init__(self, fetch_url, fetcher, object_store_creator):
     self._fetch_url = fetch_url
     self._fetcher = fetcher
-    # BranchUtility is obviously cross-channel, so set the channel to None.
-    self._object_store = object_store_creator.Create(BranchUtility,
-                                                     channel=None)
+    self._object_store = object_store_creator.Create(BranchUtility)
 
   @staticmethod
   def Create(object_store_creator):
     return BranchUtility(url_constants.OMAHA_PROXY_URL,
                          AppEngineUrlFetcher(),
                          object_store_creator)
 
   @staticmethod
   def GetAllChannelNames():
     return ['stable', 'beta', 'dev', 'trunk']
@@ skipping 44 matching lines @@
         else:
           branch_numbers[branch] += 1
 
     sorted_branches = sorted(branch_numbers.iteritems(),
                              None,
                              operator.itemgetter(1),
                              True)
     self._object_store.Set(channel_name, sorted_branches[0][0])
 
     return sorted_branches[0][0]