*re-land after rebase on top of Chrome build fix*

This patch will enable a Chromium-side CL to build dEQP/ANGLE with
GoogleTest.

BUG=angleproject:998
BUG=500736

Change-Id: Id02c66a260b0a7bab3de9cda624fe097322b2d3c
Reviewed-on: https://chromium-review.googlesource.com/281824Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@google.com>
Reviewed-by: Kenneth Russell <kbr@chromium.org>