Fired when the system changes to an active, idle or locked state. The
event fires with "locked" if the screen is locked or the screensaver
activates, "idle" if the system is unlocked and the user has not generated
any input for a specified number of seconds, and "active" when the user
generates input on an idle system.
Gets the time, in seconds, it takes until the screen is locked
automatically while idle. Returns a zero duration if the screen is never
locked automatically. Currently supported on Chrome OS only.
Returns "locked" if the system is locked, "idle" if the user has not
generated any input for a specified number of seconds, or "active"
otherwise.
detectionIntervalInSeconds The system is considered idle if
detectionIntervalInSeconds seconds have elapsed since the last user
input detected.
Sets the interval, in seconds, used to determine when the system is in an
idle state for onStateChanged events. The default interval is 60 seconds.
intervalInSeconds Threshold, in seconds, used to determine when the
system is in an idle state.