afc54e23e3
For design context and motivation, see go/dart-ffi-callbacks Change-Id: Ie463a462c8676c4a1973f377acee067253aca9f0 Cq-Include-Trybots: luci.dart.try:vm-kernel-linux-debug-simdbc64-try, vm-kernel-linux-release-simdbc64-try, vm-kernel-mac-debug-simdbc64-try, vm-kernel-mac-release-simdbc64-try, vm-kernel-reload-mac-debug-simdbc64-try, vm-kernel-reload-mac-release-simdbc64-try, vm-kernel-linux-debug-ia32-try, vm-dartkb-linux-debug-simarm64-try, vm-kernel-win-debug-ia32-try Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/101825 Commit-Queue: Samir Jindel <sjindel@google.com> Reviewed-by: Aart Bik <ajcbik@google.com> Reviewed-by: Daco Harkes <dacoharkes@google.com>