GitLab

According to go/unicros-extensions-dd, we need to keep track of which
extensions have received parental approval. This dictionary will map
extension ids to the approved version. These extensions are safe for
child users to install and enable. Deprecate global preference
profile.managed.approved_extensions for legacy supervised users as
well.

Bug: 1014700
Change-Id: Ida8fdde0f264d42e5b101a0b3057c9866fd78d7e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1864516Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Commit-Queue: Toby Huang <tobyhuang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#711774}