(Bloomberg) -- Amazon.com Inc. may soon bring Shake Shack burgers and Chipotle burritos to your door as it pushes deeper into the growing market for restaurant delivery. The e-commerce titan has been working to crack the code on food delivery for at least a decade. Now that Amazon has a major toehold in the grocery industry following its $13.7 billion acquisition of Whole Foods Market, it’s trying to muscle into the restaurant business.