[unified-heap] Adjust test expectations

This is a fixup after commits related to crbug.com/887148

Tbr: haraken@chromium.org
No-try: true
Bug: chromium:843903
Change-Id: I58530721a40968bd31db08ce5adda9a7b87a9157
Reviewed-on: https://chromium-review.googlesource.com/c/1317898
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605477}
2 files changed