[Findit] Adding logic to force try jobs regardless of bailout or previous results

appengine/findit/waterfall/swarming_tasks_to_try_job_pipeline.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.
 
 import logging
 
 from common.pipeline_wrapper import BasePipeline
 from waterfall.process_swarming_task_result_pipeline import (
     ProcessSwarmingTaskResultPipeline)
 from waterfall.run_try_job_for_reliable_failure_pipeline import (
     RunTryJobForReliableFailurePipeline)
 from waterfall.trigger_swarming_task_pipeline import TriggerSwarmingTaskPipeline
 from waterfall.try_job_type import TryJobType
 
 
 class SwarmingTasksToTryJobPipeline(BasePipeline):
   """Root Pipeline to start swarming tasks and possible try job on the build."""
 
   # Arguments number differs from overridden method - pylint: disable=W0221
   def run(
       self, master_name, builder_name, build_number, good_revision,
       bad_revision, blame_list, try_job_type, compile_targets=None,
-      targeted_tests=None, suspected_cls=None):
+      targeted_tests=None, suspected_cls=None, force_try_job_rerun=False):
 
     # A list contains tuples of step_names and classified_tests from
     # ProcessSwarmingTaskResultPipeline.
     # The format would be [('step1', {'flaky_tests': ['test1', ..], ..}), ..]
     classified_tests_by_step = []
 
     if try_job_type == TryJobType.TEST:
       for step_name, tests in targeted_tests.iteritems():
         if not tests:  # Skip non-swarming tests.
           continue
         task_id = yield TriggerSwarmingTaskPipeline(
             master_name, builder_name, build_number, step_name, tests)
         step_future = yield ProcessSwarmingTaskResultPipeline(
             master_name, builder_name, build_number, step_name, task_id)
         logging_str = (
             'Swarming task was scheduled for build %s/%s/%s step %s') % (
                 master_name, builder_name, build_number, step_name)
         logging.info(logging_str)
         classified_tests_by_step.append(step_future)
 
-   # Waits until classified_tests_by_step are ready.
+    # Waits until classified_tests_by_step are ready.
     yield RunTryJobForReliableFailurePipeline(
         master_name, builder_name, build_number, good_revision,
         bad_revision, blame_list, try_job_type, compile_targets, targeted_tests,
-        suspected_cls, *classified_tests_by_step)
+        suspected_cls, force_try_job_rerun, *classified_tests_by_step)