Michael De Luca and Pam Abdy take in the view of the rolling hills of Antibes. The sun beats down so fiercely on a lily-white tablecloth that the co-CEOs and co-chairpeople of the Warner Bros. Film Group shield themselves with Gucci and Ray-Ban shades. They resemble the all-powerful studio chiefs of yore — or at least their surroundings do. A lot has changed since the Golden Age of Hollywood: Jack Warner didn’t have two smartphones constantly buzzing, misconduct allegations involving “The Flash” star Ezra Miller and cratering share prices to worry about. “It’s so competitive now,” De Luca says, looking out at the shimmering water. “We all have to sing for our supper.”