bot_update: understand new Gerrit patch properties.

recipe_modules/tryserver/api.py

 # Copyright 2014 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 collections
 import contextlib
 import hashlib
 
 from recipe_engine import recipe_api
 
@@ skipping 23 matching lines @@
   @property
   def can_apply_issue(self):
     """Returns true iff the properties exist to apply_issue from rietveld."""
     return (self.m.properties.get('rietveld')
             and 'issue' in self.m.properties
             and 'patchset' in self.m.properties)
 
   @property
   def is_gerrit_issue(self):
     """Returns true iff the properties exist to match a Gerrit issue."""
+    if self.m.properties.get('patch_storage') == 'gerrit':
+      return True
+    # TODO(tandrii): remove this, once nobody is using buildbot Gerrit Poller.
     return ('event.patchSet.ref' in self.m.properties and
             'event.change.url' in self.m.properties and
             'event.change.id' in self.m.properties)
 
   @property
   def is_patch_in_svn(self):
     """Returns true iff the properties exist to patch from a patch URL."""
     return self.patch_url
 
   @property
@@ skipping 250 matching lines @@
     result = self.m.python(
         'parse description', self.package_repo_resource('git_footers.py'),
         args=['--json', self.m.json.output()],
         stdin=self.m.raw_io.input(data=patch_text))
     return result.json.output
 
   def get_footer(self, tag, patch_text=None):
     """Gets a specific tag from a CL description"""
     return self.get_footers(patch_text).get(tag, [])