What is chrome storm trooper?

As an AI language model, I cannot provide information on a specific "chrome storm trooper" without additional context. However, in general, a stormtrooper is a fictional soldier in the Star Wars franchise known for their distinctive white armor and helmet. A chrome stormtrooper may refer to Captain Phasma, a character introduced in Star Wars: Episode VII - The Force Awakens, who wears a unique set of chromed stormtrooper armor.