[polymer] Merge of master into polymer10-migration

dashboard/dashboard/start_try_job.py

 # Copyright 2015 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.
 
 """URL endpoint containing server-side functionality for bisect try jobs."""
 
 import difflib
 import hashlib
 import json
 import logging
@@ skipping 606 matching lines @@
   if not bisect_job.key:
     bisect_job.put()
 
   if bisect_job.use_buildbucket:
     result = _PerformBuildbucketBisect(bisect_job)
   else:
     result = _PerformLegacyBisect(bisect_job)
   if 'error' in result:
     bisect_job.run_count += 1
     bisect_job.SetFailed()
+    comment = 'Bisect job failed to kick off'
+  elif result.get('issue_url'):
+    comment = 'Started bisect job %s' % result['issue_url']
+  else:
+    comment = 'Started bisect job: %s' % result
+  if bisect_job.bug_id:
+    issue_tracker = issue_tracker_service.IssueTrackerService(
+        additional_credentials=utils.ServiceAccountCredentials())
+    issue_tracker.AddBugComment(bisect_job.bug_id, comment, send_email=False)
   return result
 
 
 def _PerformLegacyBisect(bisect_job):
   bot = bisect_job.bot
   email = bisect_job.email
   bug_id = bisect_job.bug_id
 
   config_dict = bisect_job.GetConfigDict()
   config_dict['try_job_id'] = bisect_job.key.id()
@@ skipping 231 matching lines @@
 
 def _GetTryServerBucket(bisect_job):
   """Returns the bucket name to be used by buildbucket."""
   master_bucket_map = namespaced_stored_object.Get(_MASTER_BUILDBUCKET_MAP_KEY)
   default = 'master.tryserver.chromium.perf'
   if not master_bucket_map:
     logging.warning(
         'Could not get bucket to be used by buildbucket, using default.')
     return default
   return master_bucket_map.get(bisect_job.master_name, default)