'View Manager' is simply the old name for the VMware Horizon View product. The iteration of names was something like;
VMware Virtual Desktop Manager 2.0
VMware View Manager 3.0
VMware View 4.0 -> 5.1
VMware Horizon View 5.2
Looks like the doc team hasn't changed that reference yet. Image may be NSFW.
Clik here to view.
It should just read 'we can add vCenter Server instances to View through View Administrator.
-Mike