Upstream service worker ext. event tests to WPT

third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/extendable-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(url) {
-  return url.split('/').slice(-1)[0];
-}
-
-oninstall = function(e) {
-  switch (stripScopeName(self.location.href)) {
-    case 'install-fulfilled':
-      e.waitUntil(fulfillPromise());
-      break;
-    case 'install-rejected':
-      e.waitUntil(rejectPromise());
-      break;
-    case 'install-multiple-fulfilled':
-      e.waitUntil(fulfillPromise());
-      e.waitUntil(fulfillPromise());
-      break;
-    case 'install-reject-precedence':
-      e.waitUntil(fulfillPromise());
-      e.waitUntil(rejectPromise());
-      break;
-  }
-};
-
-onactivate = function(e) {
-  switch (stripScopeName(self.location.href)) {
-    case 'activate-fulfilled':
-      e.waitUntil(fulfillPromise());
-      break;
-    case 'activate-rejected':
-      e.waitUntil(rejectPromise());
-      break;
-  }
-};