Remove #pragma once from ash

ash/wm/app_list_controller.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_WM_APP_LIST_CONTROLLER_H_
 #define ASH_WM_APP_LIST_CONTROLLER_H_
-#pragma once
 
 #include "ash/launcher/launcher_icon_observer.h"
 #include "ash/shell_observer.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/timer.h"
 #include "ui/aura/event_filter.h"
 #include "ui/aura/focus_change_observer.h"
 #include "ui/aura/root_window_observer.h"
 #include "ui/compositor/layer_animation_observer.h"
@@ skipping 93 matching lines @@
   // The AppListView this class manages, owned by its widget.
   app_list::AppListView* view_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListController);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_APP_LIST_CONTROLLER_H_