Teach CQ status app to check login status of users.

appengine/chromium_cq_status/handlers/stats_data_points.py

Index: appengine/chromium_cq_status/handlers/stats_data_points.py
diff --git a/appengine/chromium_cq_status/handlers/stats_data_points.py b/appengine/chromium_cq_status/handlers/stats_data_points.py
index df2b8bca8d2b37e1501c7ff50eb3fce78381e62a..7768e8cb561a9f16a7beacd2113cb69dd6a3e37c 100644
--- a/appengine/chromium_cq_status/handlers/stats_data_points.py
+++ b/appengine/chromium_cq_status/handlers/stats_data_points.py
@@ -5,10 +5,12 @@
 import webapp2
 
 from model.cq_stats import CQStats
-from shared.utils import cross_origin_json
+from shared import utils
+
 
 class StatsDataPoints(webapp2.RequestHandler):
-  @cross_origin_json
+  @utils.cross_origin_json
+  @utils.read_access
   def get(self, ranking, name, cq_stats_key): # pylint: disable=R0201
     cq_stats = CQStats.get_by_id(int(cq_stats_key))
     assert cq_stats, '%s must match a CQStats entry.' % cq_stats_key