Modernize usage of base::Value in //dbus

base::Value refactoring doc:
https://docs.google.com/document/d/1CwYuMXnVQsRsghwVzEkWj9GZzfERputSLQaKx5xLhjQ

R=hashimoto

Bug: 1187001
Change-Id: Ia5907236f125ce530b451bc7f214715fea865791
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3367747
Auto-Submit: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Ryo Hashimoto <hashimoto@chromium.org>
Commit-Queue: Ryo Hashimoto <hashimoto@chromium.org>
Cr-Commit-Position: refs/heads/main@{#957457}
NOKEYCHECK=True
GitOrigin-RevId: 4e92ab0d584fd9c653779009d90ad28eba884ddd
3 files changed