[heap] Allow pausing incremental steps

Bug: 843903
Change-Id: I51f920f3e775e09ebb8b1dcc569f229b1c98c678
Reviewed-on: https://chromium-review.googlesource.com/c/1280662
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599621}
2 files changed