This is to help dEQP support become cross platform.

BUG=angleproject:892

Change-Id: I4480b64a33b1725fb42769bf7dddef1b4ee27c83
Reviewed-on: https://chromium-review.googlesource.com/273594Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>