MSRTSS uses AppendToPNextChain due to non-NULL pNext. As discussed in: https://chromium-review.googlesource.com/c/angle/angle/+/4116675/comment/3097cb31_16922d39/ Not currently causing issues as it requires very recent drivers but I saw the `ASSERT(ptr->pNext == nullptr);` in AddToPNextChain fail somewhere. Bug: angleproject:7899 Change-Id: Id46162a5aacd3d8599382ce1dfca25aca5e730e1 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4296801 Auto-Submit: Roman Lavrov <romanl@google.com> Commit-Queue: Yuxin Hu <yuxinhu@google.com> Reviewed-by: Yuxin Hu <yuxinhu@google.com>