[polymer] Merge of master into polymer10-migration

dashboard/dashboard/start_try_job.py

Index: dashboard/dashboard/start_try_job.py
diff --git a/dashboard/dashboard/start_try_job.py b/dashboard/dashboard/start_try_job.py
index b5bee2c264dec2ad94ef36757f2b82f0136fc939..117b10235aaeb6aa3d8a89a9e43ca06f57aefcd1 100644
--- a/dashboard/dashboard/start_try_job.py
+++ b/dashboard/dashboard/start_try_job.py
@@ -624,6 +624,15 @@ def PerformBisect(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