chromeos: Remove old status-area related code.

ash/shell/shell_delegate_impl.cc

 // 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.
 
 #include "ash/shell/shell_delegate_impl.h"
 
 #include "ash/shell/example_factory.h"
 #include "ash/shell/launcher_delegate_impl.h"
 #include "ash/shell/toplevel_window.h"
 #include "ash/shell_window_ids.h"
@@ skipping 12 matching lines @@
 
 ShellDelegateImpl::~ShellDelegateImpl() {
 }
 
 void ShellDelegateImpl::SetWatcher(WindowWatcher* watcher) {
   watcher_ = watcher;
   if (launcher_delegate_)
     launcher_delegate_->set_watcher(watcher);
 }
 
-views::Widget* ShellDelegateImpl::CreateStatusArea() {
-  return NULL;
-}
-
 bool ShellDelegateImpl::IsUserLoggedIn() {
   return true;
 }
 
 void ShellDelegateImpl::LockScreen() {
   ash::shell::CreateLockScreen();
   locked_ = true;
   ash::Shell::GetInstance()->UpdateShelfVisibility();
 }
 
@@ skipping 36 matching lines @@
     ash::SystemTray* tray) {
   return NULL;
 }
 
 ash::UserWallpaperDelegate* ShellDelegateImpl::CreateUserWallpaperDelegate() {
   return NULL;
 }
 
 }  // namespace shell
 }  // namespace ash