[Predator] Add CrashData class to process raw json crash data.

appengine/findit/gae_libs/testcase.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.
 
 import os
 
 from testing_utils import testing
 
 from gae_libs.http.http_client_appengine import HttpClientAppengine
 from libs import time_util
@@ skipping 57 matching lines @@
   def MockUTCNow(self, mocked_utcnow):
     """Mocks utcnow with the given value for testing."""
     self.mock(time_util, 'GetUTCNow', lambda: mocked_utcnow)
 
   def MockUTCNowWithTimezone(self, mocked_utcnow):
     """Mocks utcnow with the given value for testing."""
     self.mock(time_util, 'GetUTCNowWithTimezone', lambda: mocked_utcnow)
 
   def GetMockHttpClient(self, response_for_url=None):
     """Returns mocked http client class."""
-    return MockHttpClient(response_for_url)
+    return MockHttpClient(response_for_url or {})
+
+  def GetMockRepoFactory(self, response_for_url=None):
+    """Returns mocked repository factory."""
+    return GitilesRepository.Factory(
+        self.GetMockHttpClient(response_for_url or {}))