This should fix a build failure on a GPU try bot so we can Roll ANGLE

BUG=angleproject:892

Change-Id: I86cb0135dc71b003f691633e339d5d0527eaace4
Reviewed-on: https://chromium-review.googlesource.com/280396Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>