Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/settings/settings_sync_processor.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_SYNC_PROCESSOR_H_
 #define CHROME_BROWSER_EXTENSIONS_SETTINGS_SETTINGS_SYNC_PROCESSOR_H_
-#pragma once
 
 #include <set>
 #include <string>
 
 #include "chrome/browser/value_store/value_store_change.h"
 #include "sync/api/sync_error.h"
 
 namespace syncer {
 class SyncChangeProcessor;
 }  // namespace syncer
@@ skipping 41 matching lines @@
   // Keys of the settings that are currently being synced. Used to decide what
   // kind of action (ADD, UPDATE, REMOVE) to send to sync.
   std::set<std::string> synced_keys_;
 
   DISALLOW_COPY_AND_ASSIGN(SettingsSyncProcessor);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_SETTINGS_SETTINGS_SYNC_PROCESSOR_H_