BEIJING — As the Chinese government forges ahead on a multibillion-dollar effort to blanket the country with surveillance cameras, one American company stands to profit: Bain Capital, the private equity firm founded by Mitt Romney. In December, a Bain-run fund in which a Romney family blind trust has holdings purchased the video surveillance division of a Chinese company that claims to be the largest supplier to the governmentÂ’s Safe Cities program, a highly advanced monitoring system that allows the authorities to watch over university campuses, hospitals, mosques and movie theaters from centralized command posts.The Bain-owned company, Uniview Technologies, (浙江宇视科技有é™å…¬å¸) produces...