In /graph_json, check internal_only on Test entity and skip test for all Row entities.

dashboard/dashboard/mr.py

Index: dashboard/dashboard/mr.py
diff --git a/dashboard/dashboard/mr.py b/dashboard/dashboard/mr.py
index 4650b428c6dabd1d56a2b73a0e425ecc38635bc5..3b1c4f2779cef2f2608de5d35d1e60f279f75d10 100644
--- a/dashboard/dashboard/mr.py
+++ b/dashboard/dashboard/mr.py
@@ -25,6 +25,7 @@ from mapreduce import operation as op
 
 from google.appengine.ext import ndb
 
+from dashboard import datastore_hooks
 from dashboard import layered_cache
 from dashboard import request_handler
 from dashboard.models import graph_data
@@ -94,6 +95,7 @@ def DeprecateTestsMapper(entity):
     return
 
   # Fetch the last row.
+  datastore_hooks.SetPrivilegedRequest()
   query = graph_data.Row.query(graph_data.Row.parent_test == entity.key)
   query = query.order(-graph_data.Row.timestamp)
   last_row = query.get()