chromeos: Migrate SignOut and RequestRestartForUpdate to mojo interface

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 85 matching lines @@
 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();
 }
 
+void SystemTrayController::SignOut() {
+  if (ConnectToSystemTrayClient())
+    system_tray_client_->SignOut();
+}
+
+void SystemTrayController::RequestRestartForUpdate() {
+  if (ConnectToSystemTrayClient())
+    system_tray_client_->RequestRestartForUpdate();
+}
+
 void SystemTrayController::BindRequest(mojom::SystemTrayRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 bool SystemTrayController::ConnectToSystemTrayClient() {
   // Unit tests may not have a connector.
   if (!connector_)
     return false;
 
 #if defined(OS_CHROMEOS)
@@ skipping 19 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