D3D11: Consolidate primitive topology application. BUG=angleproject:2045 Change-Id: Ie1deac50a534ee748518d9ec5e6f749f3c78b53d Reviewed-on: https://chromium-review.googlesource.com/531795 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>