| Index: appengine/chromium_rietveld/codereview/common.py | 
| diff --git a/appengine/chromium_rietveld/codereview/common.py b/appengine/chromium_rietveld/codereview/common.py | 
| index 94834b8c87d887b15c702dea5d8cca52f26cb044..4b14eb8760cf52526ac73b7b4dc86b4482d6c26c 100644 | 
| --- a/appengine/chromium_rietveld/codereview/common.py | 
| +++ b/appengine/chromium_rietveld/codereview/common.py | 
| @@ -14,4 +14,16 @@ | 
|  | 
| import os | 
|  | 
| +from google.appengine.api import app_identity | 
| + | 
| +from django.conf import settings as django_settings | 
| + | 
| + | 
| IS_DEV = os.environ['SERVER_SOFTWARE'].startswith('Dev')  # Development server | 
| + | 
| + | 
| +def get_preferred_domain_name(): | 
| +  """Returns preferred hostname for this GAE app.""" | 
| +  app_id = app_identity.get_application_id() | 
| +  canonical_host = '%s.appspot.com' % app_id | 
| +  return django_settings.PREFERRED_DOMAIN_NAMES.get(app_id, canonical_host) | 
|  |