I think we want this eventually.

For try-job time, it is more than the Swarming task execution time, because there is also code checkout/compile/etc.

Throwing over to lijeffrey@ getting an error when writing a unit test.

  File "/usr/local/google/home/wylieb/chromium/infra-internal/infra/appengine/findit/model/flake/flake_try_job_data.py", line 23, in builder_name
    return FlakeTryJob.GetBuilderName(self.try_job_key)
  File "/usr/local/google/home/wylieb/chromium/infra-internal/infra/appengine/findit/model/base_try_job.py", line 33, in GetBuilderName
    return key.pairs()[0][1].split('/')[1]
AttributeError: 'NoneType' object has no attribute 'pairs'

Code block
    try_job_data = ndb.Key(urlsafe=try_job.try_job_ids[-1]).get()
    data_point.elapsed_seconds = int(
        (try_job_data.end_time - try_job_data.start_time).total_seconds())

The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/f336163454a30e8ac87198b3e9409d39658d46f3

commit f336163454a30e8ac87198b3e9409d39658d46f3
Author: Jeffrey Li <lijeffrey@chromium.org>
Date: Fri Oct 13 21:34:24 2017

[Findit] Flake Analyzer - Include elapsed time of try jobs in data points

Bug:  773884 
Change-Id: Idc0327266b0ccdf85b876dea14031ae31f87f537
Reviewed-on: https://chromium-review.googlesource.com/719580
Reviewed-by: Brandon Wylie <wylieb@chromium.org>
Commit-Queue: Jeffrey Li <lijeffrey@chromium.org>

[modify] https://crrev.com/f336163454a30e8ac87198b3e9409d39658d46f3/appengine/findit/waterfall/flake/process_flake_try_job_result_pipeline.py
[modify] https://crrev.com/f336163454a30e8ac87198b3e9409d39658d46f3/appengine/findit/waterfall/flake/test/process_flake_try_job_result_pipeline_test.py