Use base::HeapArray in chrome/installer/util

Fixed: 326458649
Fixed: 326458157
Fixed: 326458429
Change-Id: I5a04928ab59a69b22ca8a4e67651d1d33aa50826
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5402193


Commit-Queue: Greg Thompson <grt@chromium.org>
Auto-Submit: Avi Drissman <avi@chromium.org>
Reviewed-by: Greg Thompson <grt@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1279014}