Grab a reference to the Headers object to set its guard value
Grab a reference to the Headers object to set its guard value

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