Service Workers: InstallPhaseEvent -> ExtendableEvent

LayoutTests/http/tests/serviceworker/resources/install-phase-event-waituntil.js

-var pendingPorts = [];
-var portResolves = [];
-
-onmessage = function(e) {
-    var message = e.data;
-    if ('port' in message) {
-        var resolve = self.portResolves.shift();
-        if (resolve)
-            resolve(message.port);
-        else
-            self.pendingPorts.push(message.port);
-    }
-};
-
-function fulfillPromise() {
-    return new Promise(function(resolve) {
-        // Make sure the oninstall/onactivate callback returns first.
-        Promise.resolve().then(function() {
-            var port = self.pendingPorts.shift();
-            if (port)
-                resolve(port);
-            else
-                self.portResolves.push(resolve);
-        });
-    }).then(function(port) {
-        port.postMessage('SYNC');
-        return new Promise(function(resolve) {
-            port.onmessage = function(e) {
-                if (e.data == 'ACK')
-                    resolve();
-            };
-        });
-    });
-}
-
-function rejectPromise() {
-    return new Promise(function(resolve, reject) {
-        // Make sure the oninstall/onactivate callback returns first.
-        Promise.resolve().then(reject);
-    });
-}
-
-function stripScopeName(scope) {
-    return scope.split('/').slice(-1)[0];
-}
-
-oninstall = function(e) {
-    switch (stripScopeName(self.scope)) {
-        case 'install-fulfilled':
-            e.waitUntil(fulfillPromise());
-            break;
-        case 'install-rejected':
-            e.waitUntil(rejectPromise());
-            break;
-    }
-};
-
-onactivate = function(e) {
-    switch (stripScopeName(self.scope)) {
-        case 'activate-fulfilled':
-            e.waitUntil(fulfillPromise());
-            break;
-        case 'activate-rejected':
-            e.waitUntil(rejectPromise());
-            break;
-        case 'activate-multiple-fulfilled':
-            e.waitUntil(fulfillPromise());
-            e.waitUntil(fulfillPromise());
-            break;
-        case 'activate-reject-precedence':
-            e.waitUntil(fulfillPromise());
-            e.waitUntil(rejectPromise());
-            break;
-    }
-};