Cascade shutdown of instances

mash/login/login.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 "mash/login/login.h"
 
 #include "base/macros.h"
 #include "mash/login/ui.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 #include "mojo/shell/public/cpp/connector.h"
@@ skipping 14 matching lines @@
         controller_(controller),
         user_id_(user_id),
         binding_(this, std::move(request)) {}
   ~Login() override {}
 
  private:
   // mojom::Login:
   void ShowLoginUI() override {
     UI::Show(connector_, controller_);
   }
-  void Logout() override {
-    controller_->init()->StopServicesForUser(user_id_);
-    UI::Show(connector_, controller_);
-  }
   void SwitchUser() override {
     UI::Show(connector_, controller_);
   }
 
   mojo::Connector* connector_;
   LoginController* controller_;
   const std::string user_id_;
   mojo::StrongBinding<mojom::Login> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(Login);
@@ skipping 22 matching lines @@
 }
 
 void LoginController::Create(mojo::Connection* connection,
                              mojom::LoginRequest request) {
   new Login(connector_, this, connection->GetRemoteIdentity().user_id(),
             std::move(request));
 }
 
 }  // namespace login
 }  // namespace main