Currently enabled for Windows by default.

BUG=angleproject:1319

Change-Id: I87921c579bee466465fb1e3f629bb3a40fdff659
Reviewed-on: https://chromium-review.googlesource.com/328730Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>