ash: Some code-cleanup in the system-tray code.

ash/shell.h

 // Copyright (c) 2012 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_SHELL_H_
 #define ASH_SHELL_H_
 #pragma once
 
 #include <utility>
 #include <vector>
@@ skipping 347 matching lines @@
   internal::ShelfLayoutManager* shelf_;
 
   // Manages layout of panels. Owned by PanelContainer.
   internal::PanelLayoutManager* panel_layout_manager_;
 
   ObserverList<ShellObserver> observers_;
 
   // Owned by aura::RootWindow, cached here for type safety.
   internal::RootWindowLayoutManager* root_window_layout_;
 
-  // Status area with clock, Wi-Fi signal, etc.
-  views::Widget* status_widget_;
-
-  // System tray with clock, Wi-Fi signal, etc. (a replacement in progress for
-  // |status_widget_|).
+  // System tray with clock, Wi-Fi signal, etc.
   scoped_ptr<SystemTray> tray_;
 
   // Used by ash/shell.
   content::BrowserContext* browser_context_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_