[Predator] Switch from anonymous dict to CrashData.

appengine/findit/util_scripts/iterator.py

Index: appengine/findit/util_scripts/iterator.py
diff --git a/appengine/findit/util_scripts/iterator.py b/appengine/findit/util_scripts/iterator.py
index 813f050ebed1da8b285feca43f2a15ce0ec0f7fa..6895abd54235fc436118608e3b6f72fbf8eb8a7a 100644
--- a/appengine/findit/util_scripts/iterator.py
+++ b/appengine/findit/util_scripts/iterator.py
@@ -36,9 +36,9 @@ def Iterate(query,
   Args:
     query (ndb.Query): The query to fetch entities.
     app_id (str): App engine app id.
-    fields (list): Field names of an datastore model entity to be projected
-      to a dict. If None provided, return the entities instead of projected
-      dict.
+    fields (list or None): Field names of an datastore model entity to be
+      projected to a dict. If None provided, return the entities instead of
+      projected dict.
     filter_func (function): A function that does in memory filtering.
     batch_size (int): The number of entities to query at one time.
     batch_run (bool): If True, iterate batches of entities, if