[Findit] Add cracas_crash_analysis

appengine/findit/model/crash/chrome_crash_analysis.py

Index: appengine/findit/model/crash/chrome_crash_analysis.py
diff --git a/appengine/findit/model/crash/chrome_crash_analysis.py b/appengine/findit/model/crash/chrome_crash_analysis.py
new file mode 100644
index 0000000000000000000000000000000000000000..8e6bd44e4190ba40845d0193356f951a8da54406
--- /dev/null
+++ b/appengine/findit/model/crash/chrome_crash_analysis.py
@@ -0,0 +1,19 @@
+# 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 google.appengine.ext import ndb
+
+from model.crash.crash_analysis import CrashAnalysis
+
+
+class ChromeCrashAnalysis(CrashAnalysis):
+  """Represents an analysis of a Chrome Crash (Cracas or Fracas)."""
+  # Customized properties for Fracas crash.
+  historical_metadata = ndb.JsonProperty(indexed=False)
+  channel = ndb.StringProperty(indexed=False)
+
+  def Reset(self):
+    super(ChromeCrashAnalysis, self).Reset()
+    self.historical_metadata = None
+    self.channel = None