BUG=angleproject:2161

Change-Id: I7eda4d654cd0c0bc55ff344c5927d738ce592fe4
Reviewed-on: https://chromium-review.googlesource.com/891839
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>