Most of the MacBook-ready backpacks we’ve seen are soft, brightly colored, and ready to keep your laptop snug at school. Chrome’s bags generally take a completely different tack: ruggedized and dark-toned, they’re designed to be used in urban and harsh outdoor environments, with atypically durable materials. Bravo ($160) is an example of Chrome’s philosophy writ large: this unusually capacious waterproof backpack screams “take…