update_engine: Policy determines P2P enabled status.
This switches the P2P Manager to use the newly introduced Update Manger
policy requests in determining whether P2P is enabled on the system.
There is a policy request for the initial state (P2PEnabled, sync) and
for tracking changes (P2PEnabledChanged, async), with the latest known
value being cached by the P2P Manager.
This also reverses a recent change that moved P2P prefs setting into the
P2PManager. In the absence of any additional logic (now cleared) there
was no point in having a dedicated method just for that, and so
dbus_service writes the prefs value directly. This affords us removing
the prefs argument when initializing the P2PManager.
BUG=chromium:425233
TEST=Unit tests.
Change-Id: I53280f05da8fe532b6502c175a8cc9ddc1e15a87
Reviewed-on: https://chromium-review.googlesource.com/226937
Tested-by: Gilad Arnold <[email protected]>
Reviewed-by: David Zeuthen <[email protected]>
Commit-Queue: Gilad Arnold <[email protected]>
8 files changed
