Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/settings/settings_storage_factory.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_SETTINGS_SETTINGS_STORAGE_FACTORY_H_
 #define CHROME_BROWSER_EXTENSIONS_SETTINGS_SETTINGS_STORAGE_FACTORY_H_
-#pragma once
 
 #include <string>
 
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 
 class ValueStore;
 
 namespace extensions {
 
@@ skipping 10 matching lines @@
       const FilePath& base_path, const std::string& extension_id) = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<SettingsStorageFactory>;
   virtual ~SettingsStorageFactory() {}
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_SETTINGS_SETTINGS_STORAGE_FACTORY_H_