BUG=angleproject:830

Change-Id: Icd854ee152f15ec1de4293b5ed2ed49cb1a5fc2b
Reviewed-on: https://chromium-review.googlesource.com/270451Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>