I am personally leery of chrome plating on bolts as fatigue appears to be the primary failure mechanism for that part. To my understanding chrome surfaces have cracks inherent to the plating process which would provide initiation points for fracture. The only peer reviewed paper I was able to find via a quick Google search on the subject of chrome plating and endurance limits was from 1949, it mentioned a marked reduction in endurance limits of plated specimens vs unplated ones. However, I am sure that processes have come a long ways since then so its results may not applicable.

Hopefully someone who is more knowledgeable of chrome plating and it's effects on engineering materials can chime in.