Texas regulators that killed two earlier deals for a major piece of the state’s power infrastructure, Oncor, yesterday gave the nod to Sempra Energy’s $9.45 billion deal for a majority stake, WSJ Pro Bankruptcy reported. Sempra, of California, was the winner of a competition that lasted years, a contest for the thriving transmissions business that dominated the bankruptcy of Energy Future Holdings Corp., the former TXU Corp. The Public Utility Commission of Texas voted to approve Sempra’s buyout of Energy Future’s 80 percent stake in the business, which carries power to millions of people.