GitLab

Checking path existence in procfs is fast, it's not necessary to use
ScopedAllowIO.

Bug: 1166221
Change-Id: I60ec3f5865239ba426f3064ce5a05d6688320de8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2631807
Commit-Queue: Brian Geffon <bgeffon@chromium.org>
Reviewed-by: Brian Geffon <bgeffon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844105}