Chrome Version: 73.0.3667.0 (and others)
OS: Chrome R73-11566.0.0 (and others)

What steps will reproduce the problem?
(1) go to login screen
(2) disable WiFi in UI (or otherwise disable the WiFi device in shill)
(3) watch /var/log/net.log or `dbus-monitor --system`

What is the expected result?

Do not see scan requests


What happens instead?

Every seconds see this in net.log:

2019-01-16T19:04:09.725902-08:00 INFO shill[1556]: [INFO:wifi.cc(315)] Scan on wlan0 from RequestScan

And stuff like this in dbus-monitor:

method call time=1547694169.725743 sender=:1.88 -> destination=org.chromium.flimflam serial=255 path=/; interface=org.chromium.flimflam.Manager; member=RequestScan
   string "wifi"



This does not happen once we get through login (e.g., Guest mode)

These requests end up being harmless, as shill still keeps track of the Enabled state and doesn't bother to re-start the WiFi device. But this is spammy and wasteful.