chromeos: Remove old status-area related code.

ash/shell_delegate.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_DELEGATE_H_
 #define ASH_SHELL_DELEGATE_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 20 matching lines @@
 class SystemTray;
 class SystemTrayDelegate;
 class UserWallpaperDelegate;
 
 // Delegate of the Shell.
 class ASH_EXPORT ShellDelegate {
  public:
   // The Shell owns the delegate.
   virtual ~ShellDelegate() {}
 
-  // Invoked to create a new status area. Can return NULL.
-  virtual views::Widget* CreateStatusArea() = 0;
-
   // Returns true if user has logged in.
   virtual bool IsUserLoggedIn() = 0;
 
   // Invoked when a user locks the screen.
   virtual void LockScreen() = 0;
 
   // Unlock the screen. Currently used only for tests.
   virtual void UnlockScreen() = 0;
 
   // Returns true if the screen is currently locked.
@@ skipping 21 matching lines @@
   // Creates a system-tray delegate. Shell takes ownership of the delegate.
   virtual SystemTrayDelegate* CreateSystemTrayDelegate(SystemTray* tray) = 0;
 
   // Creates a user wallpaper delegate. Shell takes ownership of the delegate.
   virtual UserWallpaperDelegate* CreateUserWallpaperDelegate() = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_DELEGATE_H_