Fix #435 again: Explicitly construct URL objects for URL manipulation
Fix #435 again: Explicitly construct URL objects for URL manipulation

chadoliver/ServiceWorker,martinthomson/ServiceWorker,chadoliver/ServiceWorker,slightlyoff/ServiceWorker,karolklp/ServiceWorker,mkruisselbrink/ServiceWorker,zuzusik/ServiceWorker,justinleoye/ServiceWorker,martinthomson/ServiceWorker,mkruisselbrink/ServiceWorker,karolklp/ServiceWorker,chadoliver/ServiceWorker,justinleoye/ServiceWorker,slightlyoff/ServiceWorker,martinthomson/ServiceWorker,justinleoye/ServiceWorker,zuzusik/ServiceWorker,karolklp/ServiceWorker,zuzusik/ServiceWorker