Address ThreadHeap::willObjectBeLazilySwept() corner case.
If willObjectBeLazilySwept(object) was used when finalizing an object on a
lazily swept page, and |object| happened to reside on the same heap page,
the predicate would return the wrong result if the object had been swept
past (and it had been deemed to be alive.)
Addressed by adding a special case for querying objects on the same page,
making willObjectBeLazilySwept() precisely determine liveness in the
face of lazy sweeping.
R=
BUG=
Review-Url: https://codereview.chromium.org/2015173003
Cr-Commit-Position: refs/heads/master@{#396798}
3 files changed
