Avoid initial NetworkChangeNotifier OnDNSChanged() signal on Android

net/android/network_change_notifier_factory_android.cc

 // Copyright (c) 2012 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.
 
 #include "net/android/network_change_notifier_factory_android.h"
 
 #include "net/android/network_change_notifier_android.h"
 #include "net/android/network_change_notifier_delegate_android.h"
 
 namespace net {
 
 NetworkChangeNotifierFactoryAndroid::NetworkChangeNotifierFactoryAndroid() {}
 
 NetworkChangeNotifierFactoryAndroid::~NetworkChangeNotifierFactoryAndroid() {}
 
 NetworkChangeNotifier* NetworkChangeNotifierFactoryAndroid::CreateInstance() {
-  return new NetworkChangeNotifierAndroid(&delegate_);
+  return new NetworkChangeNotifierAndroid(&delegate_, nullptr);
 }
 
 }  // namespace net