I don't know that i've ever seen a chrome lined Nitride carrier or if that is even a thing.
From the interwebs
Oops. You got me. I only have one nitride bcg and yes, it is chrome lined.
The rest of mine are phosphate/chrome.
There used to be a guy here who would rail against nitrite bcgs stating that many had bores milled to accommodate chrome lining, only to have been nitrided instead, making them out of spec.
I hope I got that right.