488f97eb76
Generalize code which computes slots map to handle class hierarchies which include base classes with VM-described layout like _LinkedHashBase. Fixes https://github.com/dart-lang/sdk/issues/63180 TEST=vm/dart/heap_snapshot_regress_63180 Change-Id: I32ab0e258e735f745d45f25813177d0f6a6a6964 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/496861 Reviewed-by: Martin Kustermann <kustermann@google.com> Commit-Queue: Slava Egorov <vegorov@google.com>