Roll 50: Copied IDLs, PYTHON scripts from WebKit removed deleted files in WebCore

modules/serviceworkers/ServiceWorkerRegistration.idl

Index: modules/serviceworkers/ServiceWorkerRegistration.idl
diff --git a/modules/serviceworkers/ServiceWorkerRegistration.idl b/modules/serviceworkers/ServiceWorkerRegistration.idl
index c88cb42366a65c4624a7a5a91d8bd6c7e0a79849..97d7b82d84aa66545d4633191a451fa4c9550012 100644
--- a/modules/serviceworkers/ServiceWorkerRegistration.idl
+++ b/modules/serviceworkers/ServiceWorkerRegistration.idl
@@ -5,9 +5,8 @@
 // https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#service-worker-registration-obj
 [
     Exposed=(Window,Worker),
-    ActiveDOMObject,
+    DependentLifetime,
     GarbageCollected,
-    TypeChecking=Interface,
 ] interface ServiceWorkerRegistration : EventTarget {
     [Unforgeable] readonly attribute ServiceWorker? installing;
     [Unforgeable] readonly attribute ServiceWorker? waiting;
@@ -15,7 +14,7 @@
 
     readonly attribute USVString scope;
 
-    [CallWith=ScriptState, RaisesException] void update();
+    [CallWith=ScriptState] Promise<void> update();
     [CallWith=ScriptState] Promise<boolean> unregister();
 
     attribute EventHandler onupdatefound;