tree f2b4f06ab27d242a509329f2845d7f6390043d31
parent 9c3d4451a587808466b299c01f1584ae46111940
author Peter Qiu <zqiu@chromium.org> 1426203808 -0700
committer ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> 1426276257 +0000

network_WiFi_MissingBeacons: bring down AP interface to simulate AP disapperance

This is a much lightweight operation compare to the full AP teardown
(which takes more than 5 seconds to complete). This fix a possible race
where the wifi service is already removed from shill by the time we check
the state of that service. Also provides more accurate estimate for how
fast the client respond to beacon loss when AP disappears.

BUG=chromium:466355
TEST=Run this test

Change-Id: I056baae85c2ce6b0db25af56a3dc6780f94635d5
Reviewed-on: https://chromium-review.googlesource.com/259871
Reviewed-by: Zeping Qiu <zqiu@chromium.org>
Commit-Queue: Zeping Qiu <zqiu@chromium.org>
Tested-by: Zeping Qiu <zqiu@chromium.org>