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

modules/background_sync/PeriodicSyncEvent.idl

Index: modules/background_sync/PeriodicSyncEvent.idl
diff --git a/modules/background_sync/PeriodicSyncEvent.idl b/modules/background_sync/PeriodicSyncEvent.idl
deleted file mode 100644
index 826fb6c4ca45ecde0d1ed65259511a5d7e6c3bdb..0000000000000000000000000000000000000000
--- a/modules/background_sync/PeriodicSyncEvent.idl
+++ /dev/null
@@ -1,11 +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.
-
-[
-    Constructor(DOMString type, PeriodicSyncEventInit init),
-    Exposed=ServiceWorker,
-    RuntimeEnabled=BackgroundSync,
-] interface PeriodicSyncEvent : ExtendableEvent {
-    readonly attribute PeriodicSyncRegistration registration;
-};