This functionality is required by leak tracker.
TEST=locally patched these changes into the failing cbuild roll
(build/find/b1d1836082dbf5d3b78601522b0c97ce7faf8c54) and confirmed that
they fix the failing tests.
Change-Id: I307ec8ae4bd0afc1570eeee272aa54f28250b4b9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/381680
Commit-Queue: Derek Xu <derekx@google.com>
Reviewed-by: Ben Konyi <bkonyi@google.com>
Derek Xu
382b33f3ff