Implement the ServiceWorkerRegistration.getNotifications() API.

Source/modules/notifications/GetNotificationOptions.idl

Index: Source/modules/notifications/GetNotificationOptions.idl
diff --git a/Source/core/timing/ConsoleMemory.idl b/Source/modules/notifications/GetNotificationOptions.idl
similarity index 58%
copy from Source/core/timing/ConsoleMemory.idl
copy to Source/modules/notifications/GetNotificationOptions.idl
index bdd31e20383d592a38ab1140ee9328a59fd7dbd2..7ed11aaa37b4cbfe28ddabed476bd21526da63af 100644
--- a/Source/core/timing/ConsoleMemory.idl
+++ b/Source/modules/notifications/GetNotificationOptions.idl
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-[
-    ImplementedAs=ConsoleMemory,
-] partial interface Console {
-    readonly attribute MemoryInfo memory;
+// https://notifications.spec.whatwg.org/#service-worker-api
+
+dictionary GetNotificationOptions {
+    DOMString tag = "";
 };