LayoutTests/http/tests/workers/service/resources/basic-install-event-waitUntil-reject-worker.js - WebKit - Git at Google

 self.addEventListener("install", (event) => {
     event.waitUntil(new Promise((resolve, reject) => {
         setTimeout(() => {
             reject();
         }, 50);
     }));
 });
	self.addEventListener("install", (event) => {
	event.waitUntil(new Promise((resolve, reject) => {
	setTimeout(() => {
	reject();
	}, 50);
	}));
	});