ServiceWorker: Implement ServiceWorkerRegistration [1/3]

Source/modules/serviceworkers/ServiceWorkerRegistration.idl

Index: Source/modules/serviceworkers/ServiceWorkerRegistration.idl
diff --git a/Source/modules/serviceworkers/ServiceWorkerClients.idl b/Source/modules/serviceworkers/ServiceWorkerRegistration.idl
similarity index 57%
copy from Source/modules/serviceworkers/ServiceWorkerClients.idl
copy to Source/modules/serviceworkers/ServiceWorkerRegistration.idl
index a484d6e1e9b645316927631435b2dfce428891f8..5749387f7c078788d3877d5962bdc469034f9284 100644
--- a/Source/modules/serviceworkers/ServiceWorkerClients.idl
+++ b/Source/modules/serviceworkers/ServiceWorkerRegistration.idl
@@ -2,11 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#service-worker-clients-interface
+// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#service-worker-registration-obj
 [
-    Exposed=ServiceWorker,
+    ActiveDOMObject,
     RuntimeEnabled=ServiceWorker,
     WillBeGarbageCollected,
-] interface ServiceWorkerClients {
-    [CallWith=ScriptState] Promise getServiced();
+] interface ServiceWorkerRegistration : EventTarget {
+    readonly attribute ScalarValueString scope;
+
+    [CallWith=ScriptState] Promise unregister();
 };