[pinpoint] Gerrit patch support.

dashboard/dashboard/pinpoint/models/quest/find_isolate.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 dashboard.pinpoint.models import isolate
 from dashboard.pinpoint.models.quest import execution
 from dashboard.pinpoint.models.quest import quest
 from dashboard.services import buildbucket_service
 
 
@@ skipping 133 matching lines @@
   parameters = {
       'builder_name': builder_name,
       'properties': {
           'clobber': True,
           'parent_got_revision': change.base_commit.git_hash,
           'deps_revision_overrides': deps_overrides,
       },
   }
 
   if change.patch:
-    # TODO: Support Gerrit.
-    # https://github.com/catapult-project/catapult/issues/3599
-    parameters['properties'].update({
-        'patch_storage': 'rietveld',
-        'rietveld': change.patch.server,
-        'issue': change.patch.issue,
-        'patchset': change.patch.patchset,
-    })
+    parameters['properties'].update(change.patch.BuildParameters())
 
   # TODO: Look up Buildbucket bucket from builder_name.
   return buildbucket_service.Put(BUCKET, parameters)