Adding a confirmation dialog for It2Me on Mac

remoting/host/it2me/it2me_confirmation_dialog_mac.cc

Index: remoting/host/it2me/it2me_confirmation_dialog_mac.cc
diff --git a/remoting/host/it2me/it2me_confirmation_dialog_mac.cc b/remoting/host/it2me/it2me_confirmation_dialog_mac.cc
deleted file mode 100644
index fba9a043a3dfbb9298656000af0bdc85f612a4cb..0000000000000000000000000000000000000000
--- a/remoting/host/it2me/it2me_confirmation_dialog_mac.cc
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 2016 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 "remoting/host/it2me/it2me_confirmation_dialog.h"
-
-namespace remoting {
-
-std::unique_ptr<It2MeConfirmationDialog>
-It2MeConfirmationDialogFactory::Create() {
-  return nullptr;
-}
-
-}  // namespace remoting