This fixes standalone build on MSVC, and makes sure the test is
cleaned up as intended.

BUG=angleproject:1651
TEST=build on MSVC

Change-Id: I057176529b57fc8610bdd67749efcef6a4441d33
Reviewed-on: https://chromium-review.googlesource.com/435379
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>