Passes toolstash-check.

Change-Id: I1a5809f15c84f9d26064a567b45468fa56e6d5e9
Reviewed-on: https://go-review.googlesource.com/41408
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>