Don't scan on scavenge dead large objects.
Don't scan on scavenge dead large objects.

BUG=

Review URL: https://codereview.chromium.org/994893002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#27092}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh