[Findit] Add WfSuspectedCL model to save triage results for each suspected CL.

appengine/findit/model/wf_culprit.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 google.appengine.ext import ndb
 
 from model import analysis_status as status
+from model.wf_suspected_cl import WfSuspectedCL
 
 
-class WfCulprit(ndb.Model):
+class WfCulprit(WfSuspectedCL):
   """Represents a culprit that causes a group of failures on Chromium waterfall.
 
   'Wf' is short for waterfall.
   """
 
-  # Repo or project name of the culprit, eg: chromium, etc.
-  repo_name = ndb.StringProperty(indexed=True)
-
-  # The Git hash revision of the culprit.
-  revision = ndb.StringProperty(indexed=False)
-
-  # The commit position of the culprit. Might not be available for some repo.
-  commit_position = ndb.IntegerProperty(indexed=False)
-
   # When the code-review of this culprit was notified.
   cr_notification_time = ndb.DateTimeProperty(indexed=True)
 
   # The status of code-review notification: None, RUNNING, COMPLETED, ERROR.
   cr_notification_status = ndb.IntegerProperty(indexed=True)
 
-  # The list of builds in which the culprit caused some breakage.
-  builds = ndb.JsonProperty(indexed=False)
-
-  @property
-  def project_name(self):
-    return self.repo_name
-
   @property
   def cr_notification_processed(self):
     return self.cr_notification_status in (status.COMPLETED, status.RUNNING)
 
   @property
   def cr_notified(self):
     return self.cr_notification_status == status.COMPLETED
-
-  @classmethod
-  def _CreateKey(cls, repo_name, revision):  # pragma: no cover
-    return ndb.Key(cls.__name__, '%s/%s' % (repo_name, revision))
-
-  @classmethod
-  def Create(cls, repo_name, revision, commit_position):  # pragma: no cover
-    instance = cls(key=cls._CreateKey(repo_name, revision))
-    instance.repo_name = repo_name
-    instance.revision = revision
-    instance.commit_position = commit_position
-    instance.builds = []
-    return instance
-
-  @classmethod
-  def Get(cls, repo_name, revision):  # pragma: no cover
-    return cls._CreateKey(repo_name, revision).get()