[autotest] Add timers to scheduler cleanup.

The peaks of scheduler cleanup are also starting to get high enough that
I'd like to take a look at trying to lessen them a bit.  I'm guessing
there's some indexing work to be done here, but I don't know which
queries to target.

BUG=chromium:305408
DEPLOY=scheduler
TEST=Ran scheduler

Change-Id: Ibc1924a90c2502b38e6c7e1058f675f497877369
Reviewed-on: https://chromium-review.googlesource.com/172320
Tested-by: Alex Miller <milleral@chromium.org>
Reviewed-by: Dan Shi <dshi@chromium.org>
Commit-Queue: Alex Miller <milleral@chromium.org>
1 file changed