BUG=angleproject:929

Change-Id: Ifc5ad03579c3e187721842f7585f3f06b69cbf45
Reviewed-on: https://chromium-review.googlesource.com/296682Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>