Remove #pragma once from chrome/service

chrome/service/service_process_prefs.h

 // Copyright (c) 2011 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_SERVICE_SERVICE_PROCESS_PREFS_H_
 #define CHROME_SERVICE_SERVICE_PROCESS_PREFS_H_
-#pragma once
 
 #include <string>
 
 #include "chrome/common/json_pref_store.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 // Manages persistent preferences for the service process. This is basically a
@@ skipping 31 matching lines @@
   // Removes the pref specified by |key|.
   void RemovePref(const std::string& key);
 
  private:
   scoped_refptr<JsonPrefStore> prefs_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceProcessPrefs);
 };
 
 #endif  // CHROME_SERVICE_SERVICE_PROCESS_PREFS_H_