chromeos: changes DisconnectedAppHandler to be associated with a single window

ash/mus/root_window_controller.h

 // 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.
 
 #ifndef ASH_MUS_ROOT_WINDOW_CONTROLLER_H_
 #define ASH_MUS_ROOT_WINDOW_CONTROLLER_H_
 
 #include <memory>
 
-#include "ash/mus/disconnected_app_handler.h"
 #include "ash/root_window_controller.h"
 #include "services/ui/public/interfaces/window_manager_constants.mojom.h"
 #include "ui/display/display.h"
 
 namespace aura {
 class WindowTreeHostMus;
 }
 
 namespace gfx {
 class Insets;
@@ skipping 66 matching lines @@
   gfx::Rect GetMaximizedWindowBounds() const;
 
   WindowManager* window_manager_;
   std::unique_ptr<ash::RootWindowController> ash_root_window_controller_;
   // Owned by |ash_root_window_controller_|.
   aura::WindowTreeHostMus* window_tree_host_;
   int window_count_ = 0;
 
   display::Display display_;
 
-  std::unique_ptr<DisconnectedAppHandler> disconnected_app_handler_;
-
   DISALLOW_COPY_AND_ASSIGN(RootWindowController);
 };
 
 }  // namespace mus
 }  // namespace ash
 
 #endif  // ASH_MUS_ROOT_WINDOW_CONTROLLER_H_