BUG=angleproject:970

Change-Id: I1606df42e6423fe84d3ab69029a37224adb89a9b
Reviewed-on: https://chromium-review.googlesource.com/286552Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>