Photographed by Brigitte Lacombe in Mayer’s Google office in Mountain View, California You do it. Your mom does it. Nearly every American does it: We google, about 7 billion times a month. And each time, it’s like a trip into Marissa Mayer’s mind. That sunny logo, blessedly spare interface and perfect list of links you get in response to a query are all pure Mayer. As vice president, search and us