BUG=angleproject:890

Change-Id: I8f82414d1875f80269bd9dd1f629e5b7903cb584
Reviewed-on: https://chromium-review.googlesource.com/264380Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>