(Reuters) – In one of the biggest cash settlements in the history of U.S. shareholder derivative litigation, investors who own a minority stake in Renren Inc., once known as the “Facebook of China,” are slated to receive at least $300 million to resolve claims against the controlling shareholders and other defendants, including financial tech company Social Finance Inc. The proposed settlement, announced Friday, must still be approved by New York State Supreme Court Justice Andrew Borrok of Manhattan. This was anything but a typical derivative suit – and I’m not just talking about the enormous recovery. Plaintiffs' lawyers from Reid…