GitLab

Just use base::DeleteFile() and related functions directly. The issues
that forced the creation of extensions::file_util::DeleteFile() no
longer exist.

Bug: 1009837
Change-Id: If9cc24a8ad20ef6a647ce38e57f90ad180afaef6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2284353Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#785998}