PeriodicCleanup  1344 chrome/browser/prerender/prerender_manager.cc       &PrerenderManager::PeriodicCleanup);
PeriodicCleanup  1393 chrome/browser/prerender/prerender_manager.cc       base::Bind(&PrerenderManager::PeriodicCleanup, AsWeakPtr()));
PeriodicCleanup   554 chrome/browser/prerender/prerender_manager.h   void PeriodicCleanup();