Work around MSAN complaint with pool allocator Cache a member variable accessed after destructor so MSAN doesn't consider it having an uninitialized value. Bug: b/314793573 Change-Id: I45044e0801ae12a80301240b4de05e9cae03dcc1 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5238220 Reviewed-by: Roman Lavrov <romanl@google.com> Commit-Queue: Roman Lavrov <romanl@google.com> Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>