Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/api/browsing_data/browsing_data_api.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.
 
 // Defines the Chrome Extensions BrowsingData API functions, which entail
 // clearing browsing data, and clearing the browser's cache (which, let's be
 // honest, are the same thing), as specified in the extension API JSON.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_BROWSING_DATA_BROWSING_DATA_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_BROWSING_DATA_BROWSING_DATA_API_H_
-#pragma once
 
 #include <string>
 
 #include "chrome/browser/browsing_data_remover.h"
 #include "chrome/browser/extensions/extension_function.h"
 
 class PluginPrefs;
 
 namespace extension_browsing_data_api_constants {
 
@@ skipping 212 matching lines @@
   DECLARE_EXTENSION_FUNCTION_NAME("browsingData.removeWebSQL")
 
  protected:
   virtual ~RemoveWebSQLFunction() {}
 
   // BrowsingDataExtensionFunction:
   virtual int GetRemovalMask() const OVERRIDE;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_BROWSING_DATA_BROWSING_DATA_API_H_