[Findit] Fix a bug that MonitorTryJobPipeline still runs when no try job scheduled.

appengine/findit/waterfall/start_try_job_on_demand_pipeline.py

Index: appengine/findit/waterfall/start_try_job_on_demand_pipeline.py
diff --git a/appengine/findit/waterfall/start_try_job_on_demand_pipeline.py b/appengine/findit/waterfall/start_try_job_on_demand_pipeline.py
index f08faf95ff56410835dfc8c0195385bf8f49c0d8..49eb4cefa24f6a1586b51fdc02a36b14550b1b7e 100644
--- a/appengine/findit/waterfall/start_try_job_on_demand_pipeline.py
+++ b/appengine/findit/waterfall/start_try_job_on_demand_pipeline.py
@@ -99,11 +99,6 @@ class StartTryJobOnDemandPipeline(BasePipeline):
       try_job_id = yield ScheduleCompileTryJobPipeline(
           master_name, builder_name, build_number, good_revision, bad_revision,
           try_job_type, compile_targets, suspected_revisions)
-      try_job_result = yield MonitorTryJobPipeline(
-          master_name, builder_name, build_number, try_job_type, try_job_id)
-      yield IdentifyTryJobCulpritPipeline(
-          master_name, builder_name, build_number, blame_list, try_job_type,
-          try_job_id, try_job_result)
     else:
       # If try_job_type is other type, the pipeline has returned.
       # So here the try_job_type is failure_type.TEST.
@@ -122,8 +117,9 @@ class StartTryJobOnDemandPipeline(BasePipeline):
       try_job_id = yield ScheduleTestTryJobPipeline(
           master_name, builder_name, build_number, good_revision, bad_revision,
           try_job_type, suspected_revisions, *reliable_tests)
-      try_job_result = yield MonitorTryJobPipeline(
-          master_name, builder_name, build_number, try_job_type, try_job_id)
-      yield IdentifyTryJobCulpritPipeline(
-          master_name, builder_name, build_number, blame_list, try_job_type,
-          try_job_id, try_job_result)
+
+    try_job_result = yield MonitorTryJobPipeline(
+        master_name, builder_name, build_number, try_job_type, try_job_id)
+    yield IdentifyTryJobCulpritPipeline(
+        master_name, builder_name, build_number, blame_list, try_job_type,
+        try_job_id, try_job_result)