Teach CQ status app to check login status of users.

appengine/chromium_cq_status/handlers/stats_viewer.py

Index: appengine/chromium_cq_status/handlers/stats_viewer.py
diff --git a/appengine/chromium_cq_status/handlers/stats_viewer.py b/appengine/chromium_cq_status/handlers/stats_viewer.py
index df21b2b3fc497d6f72473bbf73f882fdb996a708..37ce72c48e6357321cd900929ccc36089070de02 100644
--- a/appengine/chromium_cq_status/handlers/stats_viewer.py
+++ b/appengine/chromium_cq_status/handlers/stats_viewer.py
@@ -4,7 +4,9 @@
 
 import webapp2
 
-from shared.utils import minutes_per_day
+from shared import utils
+
+minutes_per_day = 24 * 60
 
 period_config = {
   '15-minutely': {
@@ -30,6 +32,7 @@ period_config = {
 }
 
 class StatsViewer(webapp2.RequestHandler): # pragma: no cover
+  @utils.read_access
   def get(self, project, period):
     assert period in period_config
     config = period_config[period]