Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/shell_window_registry.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 CHROME_BROWSER_EXTENSIONS_SHELL_WINDOW_REGISTRY_H_
 #define CHROME_BROWSER_EXTENSIONS_SHELL_WINDOW_REGISTRY_H_
-#pragma once
 
 #include <set>
 
 #include "base/compiler_specific.h"
 #include "base/memory/singleton.h"
 #include "base/observer_list.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
 #include "chrome/browser/profiles/profile_keyed_service_factory.h"
 #include "ui/gfx/native_widget_types.h"
 
@@ skipping 66 matching lines @@
         Profile* profile) const OVERRIDE;
     virtual bool ServiceIsCreatedWithProfile() OVERRIDE;
     virtual bool ServiceIsNULLWhileTesting() OVERRIDE;
   };
 
   ShellWindowSet shell_windows_;
   ObserverList<Observer> observers_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_SHELL_WINDOW_REGISTRY_H_