Mark taskkill as infra step

appengine/chromium_try_flakes/handlers/flake_issues.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.
 
 """Task queue endpoints for creating and updating issues on issue tracker."""
 
 import datetime
 import json
 import logging
 import urllib2
@@ skipping 61 matching lines @@
 NUM_TIMES_IN_QUEUE_FOR_STALENESS = 5
 VERY_STALE_FLAKES_MESSAGE_MANY_TIMES = (
     'Reporting to stale-flakes-reports@google.com to investigate why this '
     'issue has been in the appropriate queue %d times or more.' %
     NUM_TIMES_IN_QUEUE_FOR_STALENESS)
 STALE_FLAKES_ML = 'stale-flakes-reports@google.com'
 MAX_GAP_FOR_FLAKINESS_PERIOD = datetime.timedelta(days=3)
 KNOWN_TROOPER_FLAKE_NAMES = [
     'analyze', 'bot_update', 'compile (with patch)', 'compile',
     'device_status_check', 'gclient runhooks (with patch)', 'Patch',
-    'process_dumps', 'provision_devices', 'update_scripts']
+    'process_dumps', 'provision_devices', 'update_scripts', 'taskkill']
 
 # Flakes in these steps are always ignored:
 #  - steps: always red when any other step is red (duplicates failure)
 #  - presubmit: typically red due to missing OWNERs LGTM, not a flake
 #  - recipe failure reason: always red when build fails (not a failure)
 #  - test results: always red when another step is red (not a failure)
 #  - Uncaught Exception: summary step referring to an exception in another
 #    step (duplicates failure)
 # There are additional rules for non-trivial cases in the FlakyRun.post method.
 IGNORED_STEPS = ['steps', 'presubmit', 'recipe failure reason', 'test results',
@@ skipping 496 matching lines @@
           failure_run.buildnumber, step)
       for flake in flakes:
         flake_occurrence = FlakeOccurrence(name=step_name, failure=flake)
         flaky_run.flakes.append(flake_occurrence)
         flakes_to_update.append(flake)
 
     flaky_run_key = flaky_run.put()
     for flake in flakes_to_update:
       self.add_failure_to_flake(flake, flaky_run_key, failure_time)
     self.flaky_runs.increment_by(1)