Chipotle Mexican Grill Inc. dealing with fallout from an E. Coli outbreak that has infected 52 people in nine states, plans to become the best in the world at food safety, company officials said in a presentation to Wall Street analysts on Tuesday. At the annual Bernstein Consumer Summit in New York, officials with the Denver-based chain laid out a plan for improving food safety that they contend will put Chipotle 10 to 20 years ahead of industry norms.