[Athena] Add status icons and system time to the desktop background

athena/screen/background_controller.h

 // Copyright 2014 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 ATHENA_SCREEN_BACKGROUND_CONTROLLER_H_
 #define ATHENA_SCREEN_BACKGROUND_CONTROLLER_H_
 
 #include "base/macros.h"
 
 namespace aura {
 class Window;
 }
 
 namespace gfx {
 class ImageSkia;
 }
 
 namespace athena {
 class BackgroundView;
 
 // Controls background image switching.
 class BackgroundController {
  public:
-  explicit BackgroundController(aura::Window* container);
+  // |popup_container| is the parent window to use for the "select network"
+  // dialog.
+  BackgroundController(aura::Window* background_container,
+                       aura::Window* popup_container);
   ~BackgroundController();
 
   void SetImage(const gfx::ImageSkia& image);
 
  private:
   BackgroundView* background_view_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundController);
 };
-}
+
+}  // namespace athena
 
 #endif  // ATHENA_SCREEN_BACKGROUND_CONTROLLER_H_