[Dashboard] Get or create ancestors in add_histograms_queue

dashboard/dashboard/add_point_queue_test.py

Index: dashboard/dashboard/add_point_queue_test.py
diff --git a/dashboard/dashboard/add_point_queue_test.py b/dashboard/dashboard/add_point_queue_test.py
index 9615206496b5387dfe0b0efc53f75b35288e7782..2074bbb3d66563ee50f0a00170e0acedfc92a656 100644
--- a/dashboard/dashboard/add_point_queue_test.py
+++ b/dashboard/dashboard/add_point_queue_test.py
@@ -23,7 +23,7 @@ class GetOrCreateAncestorsTest(testing_common.TestCase):
     graph_data.TestMetadata(id='ChromiumPerf/win7/dromaeo',).put()
     graph_data.TestMetadata(id='ChromiumPerf/win7/dromaeo/dom').put()
     graph_data.TestMetadata(id='ChromiumPerf/win7/dromaeo/dom/modify').put()
-    actual_parent = add_point_queue._GetOrCreateAncestors(
+    actual_parent = add_point_queue.GetOrCreateAncestors(
         'ChromiumPerf', 'win7', 'dromaeo/dom/modify')
     self.assertEqual(
         'ChromiumPerf/win7/dromaeo/dom/modify', actual_parent.key.id())
@@ -35,7 +35,7 @@ class GetOrCreateAncestorsTest(testing_common.TestCase):
     self.assertEqual(3, len(graph_data.TestMetadata.query().fetch()))
 
   def testGetOrCreateAncestors_CreatesAllExpectedEntities(self):
-    parent = add_point_queue._GetOrCreateAncestors(
+    parent = add_point_queue.GetOrCreateAncestors(
         'ChromiumPerf', 'win7', 'dromaeo/dom/modify')
     self.assertEqual('ChromiumPerf/win7/dromaeo/dom/modify', parent.key.id())
     # Check that all the Bot and TestMetadata entities were correctly added.
@@ -69,7 +69,7 @@ class GetOrCreateAncestorsTest(testing_common.TestCase):
     alert_key = stoppage_alert.CreateStoppageAlert(test, row).put()
     test.stoppage_alert = alert_key
     test.put()
-    add_point_queue._GetOrCreateAncestors('M', 'b', 'suite/foo')
+    add_point_queue.GetOrCreateAncestors('M', 'b', 'suite/foo')
     self.assertIsNone(test.key.get().stoppage_alert)
     self.assertTrue(alert_key.get().recovered)
     self.assertIsNotNone(alert_key.get().last_row_timestamp)