BUG=angleproject:883

Change-Id: Ie1d544c8f30472238d859d8fd7f553a73b066802
Reviewed-on: https://chromium-review.googlesource.com/269145Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>