Tests that permission can be changed and properly queried from iframes.
Query success: {"name":"storage-access"}: prompt
- Set: {"name":"storage-access"} to 'granted'
Query success: {"name":"storage-access"}: granted
Query success: {"name":"storage-access"}: prompt
Query success: {"name":"notifications"}: denied
- Set: {"name":"notifications"} to 'granted'
Query success: {"name":"notifications"}: granted
- Failed to set permission: {"name":"storage-access"} error: Permission can't be granted to opaque origins.
- Failed to set permission: {"name":"storage-access"} error: Permission can't be granted to opaque origins.