Revert of chromeos: Convert ash VPNDelegate interface to mojo

ash/common/system/tray/system_tray_controller.cc

 // 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 "ash/common/system/tray/system_tray_controller.h"
 
 #include "ash/common/system/tray/system_tray_notifier.h"
 #include "ash/common/wm_shell.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 76 matching lines @@
 void SystemTrayController::ShowNetworkConfigure(const std::string& network_id) {
   if (ConnectToSystemTrayClient())
     system_tray_client_->ShowNetworkConfigure(network_id);
 }
 
 void SystemTrayController::ShowNetworkCreate(const std::string& type) {
   if (ConnectToSystemTrayClient())
     system_tray_client_->ShowNetworkCreate(type);
 }
 
-void SystemTrayController::ShowThirdPartyVpnCreate(
-    const std::string& extension_id) {
-  if (ConnectToSystemTrayClient())
-    system_tray_client_->ShowThirdPartyVpnCreate(extension_id);
-}
-
 void SystemTrayController::ShowNetworkSettings(const std::string& network_id) {
   if (ConnectToSystemTrayClient())
     system_tray_client_->ShowNetworkSettings(network_id);
 }
 
 void SystemTrayController::ShowProxySettings() {
   if (ConnectToSystemTrayClient())
     system_tray_client_->ShowProxySettings();
 }
 
@@ skipping 39 matching lines @@
 void SystemTrayController::OnClientConnectionError() {
   system_tray_client_.reset();
 }
 
 void SystemTrayController::SetUse24HourClock(bool use_24_hour) {
   hour_clock_type_ = use_24_hour ? base::k24HourClock : base::k12HourClock;
   WmShell::Get()->system_tray_notifier()->NotifyDateFormatChanged();
 }
 
 }  // namespace ash