Performance and stability improvements on all platforms.

TBR=v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com

Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: I8dbcb1e06c4231f4aecf12333dffe0f56526f020
Reviewed-on: https://chromium-review.googlesource.com/1160593
Reviewed-by: V8 Autoroller <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.0.139@{#1}
Cr-Branched-From: 640f77e76bf74d851f036e4b8bb7bf97ca267457-refs/heads/master@{#54870}