This prepares for fixing multiview test resource init/teardown order.

BUG=angleproject:2765
TEST=angle_end2end_tests

Change-Id: I841327416fa76ac682310ef1b2309f5bb4e9fbac
Reviewed-on: https://chromium-review.googlesource.com/1179155
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>