GitLab

Updating and committing prefs must happen on the same sequence while
the thread pool is still active.

This CL introduces an updater::App::Uninitialize virtual to provide a
call site for committing prefs and possibly other code that needs to
run when the updater process is shutting down.

BUG: 1061730
Change-Id: I0c293ced0e5c3ce66f921d1d65062de89f78bfc8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2103755Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Sorin Jianu <sorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#750955}