BUG=angleproject:892

Change-Id: Ic40f29c811d18efea0e081c269ca43d0170488a4
Reviewed-on: https://chromium-review.googlesource.com/269122Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/270125