Prepare to remove base::JSONReader::Read's parsing option default

Callers should be explicit if they need to opt into non-compliant JSON
parsing that allows Chromium-specific extensions, e.g. comments. This
fixes miscellaneous instances included in a typical Linux developer build.

Bug: 446188265
Change-Id: Icd3ef8b9da4f7cafc7ea8a4335f7e6c26cfde818
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6990988
Reviewed-by: Lei Zhang <thestig@chromium.org>
Owners-Override: Lei Zhang <thestig@chromium.org>
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1522532}
NOKEYCHECK=True
GitOrigin-RevId: f1b6d6ff322093d1e36b55345d9bc13a1b4e435c