BUG=angleproject:1523

Change-Id: I6e890380bafb9f81595ab603996259fe6177e9e0
Reviewed-on: https://chromium-review.googlesource.com/744447Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>