Triage dangling pointers in ChromeOS [2/N]

Those are blocking the patch:
https://chromium-review.googlesource.com/c/chromium/src/+/5385328/5
enabling the dangling pointer detector on ChromeOS, no matter the bot.

DanglingUntriaged-notes: Annotating pre-existing dangling pointers.
Bug: chromium:328104161
Change-Id: I39ae7209c1460c447793872f87e12f4df54c1036
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5398096


Reviewed-by: danakj <danakj@chromium.org>
Owners-Override: danakj <danakj@chromium.org>
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1279013}