Passes toolstash-check.

Change-Id: Id62bacff13fbd30de62b925d97a4e7bee1c66120
Reviewed-on: https://go-review.googlesource.com/59331
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>