"Logs client-side events by users taking a Extension:GuidedTour"
"Tour name, such as 'gettingstarted'"
"List of possible actions that can be taken on any given step:
* impression - guider was shown
* hide - guider was dismissed/hidden before completing the tour
* button-click - a button within the guider was clicked
* link-click - a link within the guider was clicked
* complete - user had an impression on the last step of the tour (the last in the tour definition's step list)"