[Findit] Add findit_for_client to do analysis based on client_id

appengine/findit/handlers/crash/test/crash_handler_test.py

 # Copyright 2015 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.
 
 import base64
 import json
 import os
 import re
 
 import webapp2
@@ skipping 65 matching lines @@
         },
         'subscription': 'subscription',
     }
 
     self.test_app.post_json('/_ah/push-handlers/crash/fracas',
                             request_json_data)
 
     self.assertEqual(1, len(requested_crashes))
     self.assertEqual(
         (crash_identifiers, chrome_version, signature, client_id,
-         platform, stack_trace, channel, historic_metadata),
+         platform, stack_trace, {'channel': channel,
+                                 'historical_metadata': historic_metadata}),
         requested_crashes[0])