BUG=angleproject:1455

Change-Id: I7fc2640ec9d73528feb526b4d8b89cabccda4d17
Reviewed-on: https://chromium-review.googlesource.com/367092Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>