BUG=angleproject:883

Change-Id: Idc474c58d3971c5f7c2c2760cd21aefdf65424b4
Reviewed-on: https://chromium-review.googlesource.com/263502Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>