Fix #432: Set SW's state to installing before resolving a promise
Fix #432: Set SW's state to installing before resolving a promise

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