We need an impression ping for AS router templates. It should: - only be sent when the AS router is actually visible - have a new helper method (see https://github.com/mozilla/activity-stream/blob/4d6cf505c48643b4ad8306d9c66c0a3d320a65a5/system-addon/content-src/message-center/message-center-content.jsx#L30) that defines a ping action type (should be something like ${PROVIDER}_impression) - can borrow from code that already exists to track impression pings in AS :nanj can help handle this ping / define what the ping action should be

Commits pushed to master at https://github.com/mozilla/activity-stream https://github.com/mozilla/activity-stream/commit/bdf9ca55d3520d143964b44612d54eeb9e663e04 Bug 1456145 - Add impression ping for AS Router https://github.com/mozilla/activity-stream/commit/2f718eb067433c36b68d84727b454b5f6ac3e3be Bug 1456145 - Follow-up on impression pings for AS Router