The Robert Wood Johnson Foundation is getting a makeover. It wants new health ideas to go viral. It wants partners in business and government, to magnify its impact. And it seeks game-changing ideas from inventors to improve doctor visits and reshape medicine into a "culture of health." The nation's largest health philanthropy has long been focused on discrete health problems such as smoking and obesity. But in a major policy shift publicly discussed Wednesday for the first time, the Princeton-based foundation is seeking to up its game and inspire mass movements.