Passes toolstash-check.

Change-Id: I9940909949da58e780696e6de0c21f95be7a8816
Reviewed-on: https://go-review.googlesource.com/41407
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>