OnTabClosing      934 chrome/browser/ui/browser.cc   fullscreen_controller_->OnTabClosing(contents);
OnTabClosing     1064 chrome/browser/ui/browser.cc   fullscreen_controller_->OnTabClosing(old_contents);
OnTabClosing      130 chrome/browser/ui/fullscreen/fullscreen_controller.h   void OnTabClosing(content::WebContents* web_contents);