At this point the loading of the notification icon is happening only in the Qt port, and the api needed to support this is making the notifications object a more complex. Since this is an optional feature, it would be best to factor this out into its own NotificationIconLoader class.
This grew out of reviews of bug 80477.
Didn't see the already filed bug. Oops. Duping.
*** This bug has been marked as a duplicate of bug 80702 ***
*** This bug has been marked as a duplicate of bug 80700 ***