Fix D3D11 polygon offset. We were not taking the state of GL_POLYGON_OFFSET_FILL into account. BUG=371604 Change-Id: I9b490ed043faeece86665acaef0b865bf1f7b60d Reviewed-on: https://chromium-review.googlesource.com/199121 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Tested-by: Nicolas Capens <nicolascapens@chromium.org>