mash: Add status area container to mash window manager

mash/wm/window_manager_application.h

 // Copyright 2015 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 MASH_WM_WINDOW_MANAGER_APPLICATION_H_
 #define MASH_WM_WINDOW_MANAGER_APPLICATION_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 22 matching lines @@
 namespace ui {
 class Event;
 }
 
 namespace mash {
 namespace wm {
 
 class AcceleratorRegistrarImpl;
 class RootWindowController;
 class RootWindowsObserver;
+class ShelfLayoutImpl;
 class UserWindowControllerImpl;
 
 class WindowManagerApplication
     : public shell::ShellClient,
       public mus::mojom::WindowManagerFactory,
       public shell::InterfaceFactory<mojom::ShelfLayout>,
       public shell::InterfaceFactory<mojom::UserWindowController>,
       public shell::InterfaceFactory<mus::mojom::AcceleratorRegistrar> {
  public:
   WindowManagerApplication();
@@ skipping 55 matching lines @@
                            mojo::InterfaceRequest<mus::mojom::WindowTreeClient>
                                client_request) override;
 
   shell::Connector* connector_;
 
   mojo::TracingImpl tracing_;
 
   std::unique_ptr<views::ScreenMus> screen_;
   std::unique_ptr<views::AuraInit> aura_init_;
 
-  // The ShelfLayout object is created once OnEmbed() is called. Until that
+  // The |shelf_layout_| object is created once OnEmbed() is called. Until that
   // time |shelf_layout_requests_| stores pending interface requests.
+  std::unique_ptr<ShelfLayoutImpl> shelf_layout_;
   mojo::BindingSet<mojom::ShelfLayout> shelf_layout_bindings_;
   std::vector<std::unique_ptr<mojo::InterfaceRequest<mojom::ShelfLayout>>>
       shelf_layout_requests_;
 
   // |user_window_controller_| is created once OnEmbed() is called. Until that
   // time |user_window_controller_requests_| stores pending interface requests.
   std::unique_ptr<UserWindowControllerImpl> user_window_controller_;
   mojo::BindingSet<mojom::UserWindowController>
       user_window_controller_bindings_;
   std::vector<
@@ skipping 10 matching lines @@
 
   base::ObserverList<RootWindowsObserver> root_windows_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManagerApplication);
 };
 
 }  // namespace wm
 }  // namespace mash
 
 #endif  // MASH_WM_WINDOW_MANAGER_APPLICATION_H_