Cascade shutdown of instances

mash/login/ui.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/ui.h"
 
 #include "base/guid.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/mus/public/cpp/property_type_converters.h"
 #include "mash/login/login.h"
@@ skipping 61 matching lines @@
   login_button_1_->SetStyle(views::Button::STYLE_BUTTON);
   login_button_2_->SetStyle(views::Button::STYLE_BUTTON);
   AddChildView(login_button_1_);
   AddChildView(login_button_2_);
 }
 
 UI::~UI() {
   // Prevent the window manager from restarting during graceful shutdown.
   window_manager_connection_->SetConnectionLostClosure(base::Closure());
   is_showing_ = false;
+  // TODO(beng): we should be terminating this app at this point.
 }
 
 views::View* UI::GetContentsView() { return this; }
 
 base::string16 UI::GetWindowTitle() const {
   // TODO(beng): use resources.
   return base::ASCIIToUTF16("Login");
 }
 
 void UI::DeleteDelegate() {
@@ skipping 34 matching lines @@
 }
 
 void UI::StartWindowManager() {
   window_manager_connection_ = connector_->Connect("mojo:desktop_wm");
   window_manager_connection_->SetConnectionLostClosure(
       base::Bind(&UI::StartWindowManager, base::Unretained(this)));
 }
 
 }  // namespace login
 }  // namespace mash