Chrome or a mirror coating would not work. They can only reflect the visible wavelength, and even that is not 100%. Laser are not spot lights, they're primary radiation is in the form of heat. Higher the wattage of Laser, the greater the heat it can generate. In the article, the laser was probably generating close to 1,000deg Fahrenheit. The next generation of aircraft carriers are to have a secondary dedicated nuclear generators for use with high energy weapons, ie Lasers and Rail Guns. Though as mentioned is correct in that these would be a boon for military as they wouldn't have to have as much explosives on board, not to mention the cost saving on weight and for the rounds as well. As long as you can keep generating power, you can keep on shooting.