[Predator] Switch from anonymous dict to CrashData.

appengine/findit/util_scripts/crash_queries/crash_iterator.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from datetime import date
 from datetime import datetime
 from datetime import timedelta
 
 from crash.type_enums import CrashClient
 import iterator
@@ skipping 38 matching lines @@
                    start_date=_A_YEAR_AGO,
                    end_date=_TODAY,
                    batch_size=_DEFAULT_BATCH_SIZE,
                    batch_run=False):  # pragma: no cover.
   """Genrates query to query crashes and iterates crashes.
 
   Args:
     client_id (CrashClient): One of CrashClient.FRACAS, CrashClient.CRACAS,
       CrashClient.CLUSTERFUZZ.
     app_id (str): App engine app id.
-    fields (list): Field names of CrashAnalysis entity to project.
+    fields (list or None): Field names of CrashAnalysis entity to be projected
+      to a dict. If None provided, return the entities instead of a projected
+      dict.
     property_values (dict): Property values to filter.
     start_date (str): Only iterate testcases after this date including this
       date, format '%Y-%m-%d'.
     end_date (str): Only iterate testcases before this date excluding this date,
       format '%Y-%m-%d'.
     batch_size (int): The number of crashes to query at one time.
     batch_run (bool): If True, iterate batches of crashes, if
       False, iterate each crash.
 
     An example is available in crash_printer/print_crash.py.
@@ skipping 35 matching lines @@
     batch_run (bool): If True, iterate batches of crashes, if
       False, iterate each crash.
 
     An example is available in crash_printer/print_crash.py.
   """
   for crash in IterateCrashes(client_id, app_id, fields=fields,
                               property_values=property_values,
                               start_date=start_date, end_date=end_date,
                               batch_size=batch_size, batch_run=batch_run):
     yield crash