I think the current history view is effective, for desktop, just adding a "Cloud Synced" column to the table (along with "Visited", "Website", and "Address") with a little cloud icon on all the items synced from other devices. Or perhaps adding the cloud icon to the "Visited" entry if it was synced from another device, next to the timestamp data.
For mobile, the current history view is also effective, maybe it would be possible to put the same cloud icon before the synced item's name and address.
Hope these images are helpful, something like this is what I mean (obviously with better spacing on mobile).
