In order to create UMA histograms of the form "Memory.Experimental.Browser" vs"Memory.Experimental.Renderer" or GPU we need to know the type of a process.
There are two possibilities here:
1. The service has a way to infer the process type given a ProcessId (that it will have in the map)
2. we need to push that information in the MDM callback

Take a look to how existing UMA does it. I imagine there is a way to do 1)