Without this change, rolling Googletest results in compilation errors:
https://crrev.com/c/1594628/2.

Change-Id: I85e122ad449a3d8fb155b07f64d69022294ab6cd
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1598309Reviewed-by: Victor Costan <pwnall@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Victor Costan <pwnall@chromium.org>