chore(mc): Port Bug 1421703 - Investigate apparent XPConnect cost in calling nsNavHistory observers with onVisit
chore(mc): Port Bug 1421703 - Investigate apparent XPConnect cost in calling nsNavHistory observers with onVisit

mozilla/activity-stream,Mardak/activity-stream,AdamHillier/activity-stream,Mardak/activity-stream,mozilla/activity-streams,rlr/activity-streams,mozilla/activity-stream,rlr/activity-streams,Mardak/activity-stream,mozilla/activity-stream,sarracini/activity-stream,mozilla/activity-streams,sarracini/activity-stream,Mardak/activity-stream,rlr/activity-streams,AdamHillier/activity-stream,rlr/activity-streams,mozilla/activity-stream,sarracini/activity-stream,sarracini/activity-stream,AdamHillier/activity-stream,AdamHillier/activity-stream