This is needed for Chromium CL:
https://chromium-review.googlesource.com/c/chromium/src/+/2508226

BUG=chromium:1066670
Change-Id: I61aa2a21e19cb74259413631b654cb45e3e051c3
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2508224Reviewed-by: Geoff Lang <geofflang@chromium.org>