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

modules/navigatorconnect/ServiceWorkerGlobalScopeNavigatorConnect.idl

 // Copyright 2014 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.
 
 // http://mkruisselbrink.github.io/navigator-connect/#idl-def-ServiceWorkerGlobalScope
 
 [
     RuntimeEnabled=NavigatorConnect,
 ] partial interface ServiceWorkerGlobalScope {
-    attribute EventHandler oncrossoriginconnect;
     attribute EventHandler oncrossoriginmessage;
 };