Revert "Remove a trailing zero byte that was never used for anything."

This reverts commit 4d8021584a95f10c2072074f28e6d224989c8eab.

Reason for revert: Suspecting of causing AddressSanitizer: stack-buffer-overflow.

Original change's description:
> Remove a trailing zero byte that was never used for anything.
>
> Change-Id: I98d2e5d8344c4fe7b14d827ae47ab771f25447c2
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6225749
> Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
> Commit-Queue: Steinar H Gunderson <sesse@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1415544}

Change-Id: I68153bf0a1adf1fde3af343ac50bddb99280f451
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6229712
Auto-Submit: Samuel Huang <huangs@chromium.org>
Owners-Override: Samuel Huang <huangs@chromium.org>
Commit-Queue: Samuel Huang <huangs@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1415597}