Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/mock_extension_special_storage_policy.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_MOCK_EXTENSION_SPECIAL_STORAGE_POLICY_H_
 #define CHROME_BROWSER_EXTENSIONS_MOCK_EXTENSION_SPECIAL_STORAGE_POLICY_H_
-#pragma once
 
 #include <set>
 #include <string>
 
 #include "chrome/browser/extensions/extension_special_storage_policy.h"
 #include "googleurl/src/gurl.h"
 
 // This class is the same as MockSpecialStoragePolicy (in
 // webkit/quota/mock_special_storage_policy.h), but it inherits
 // ExtensionSpecialStoragePolicy instead of quota::SpecialStoragePolicy.
@@ skipping 36 matching lines @@
 
   std::set<GURL> protected_;
   std::set<GURL> unlimited_;
   std::set<GURL> session_only_;
   std::set<std::string> file_handlers_;
 
   DISALLOW_COPY_AND_ASSIGN(MockExtensionSpecialStoragePolicy);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_MOCK_EXTENSION_SPECIAL_STORAGE_POLICY_H_