heap: Enable compaction with incremental marking on tests

Bug: 918064
Change-Id: I1fd4006b801511eb3c3fb6f33cba0e5f16e5aaf2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1581636
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653870}
2 files changed