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

modules/background_sync/SyncRegistration.idl

Index: modules/background_sync/SyncRegistration.idl
diff --git a/modules/background_sync/SyncRegistration.idl b/modules/background_sync/SyncRegistration.idl
deleted file mode 100644
index 171e3e49a46af4ad6f66fcb1d8e167295789ccbf..0000000000000000000000000000000000000000
--- a/modules/background_sync/SyncRegistration.idl
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-[
-    Exposed=(Window,ServiceWorker),
-    GarbageCollected,
-    RuntimeEnabled=BackgroundSync,
-] interface SyncRegistration {
-    [RuntimeEnabled=BackgroundSyncV2] readonly attribute DOMString tag;
-    [CallWith=ScriptState] Promise<boolean> unregister();
-};