Move gpu/ to use new base::Pickle functionality

This moves to using the new base::Pickle creation factories,
opting for a safer internalized memory.

Bug: 330028190
Change-Id: I0ef3d0dad20cf413ed33d7f40d40fc3c582bb7c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5386425


Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Auto-Submit: Avi Drissman <avi@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1277378}