Manual raw_ptr rewrite: //net

Bug: 1446392
Change-Id: I48a83ff9e133cfb17e2d2616fe5961f5374fd207
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4561049


Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Commit-Queue: David Benjamin <davidben@chromium.org>
Reviewed-by: David Benjamin <davidben@chromium.org>
Auto-Submit: Ho Cheung <uioptt24@gmail.com>
Cr-Commit-Position: refs/heads/main@{#1149320}