BUG=angleproject:884

Change-Id: Iaef596337f9c4d781fb93f517c8f605d119136fb
Reviewed-on: https://chromium-review.googlesource.com/266599Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/272746Reviewed-by: Geoff Lang <geofflang@chromium.org>