[unified-heap] Adjust wrapper tracing and integration tests

Bug: 843903
Change-Id: I95a0caae7f528be908caff24515971b29b4f645f
Reviewed-on: https://chromium-review.googlesource.com/c/1292564
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601545}
2 files changed