[WIP] Move Web Notifications to a WebFrame-less code path (Blink).

LayoutTests/fast/notifications/resources/notification-close.js

+if (self.importScripts) {
+    importScripts('../../../resources/js-test.js');
+    importScripts('notification-worker.js');
+}
+
 function runTest()
 {
     var notification = new Notification("Notification");
     notification.addEventListener("show", function() {
         testPassed("notification.onshow() has been called.");
         notification.close();
     });
 
     notification.addEventListener("close", function() {
         testPassed("notification.onclose() has been called.");
-        if (window.testRunner)
-            testRunner.notifyDone();
+        finishJSTest();
     });
 }