Remove #pragma once from chrome/browser/policy

chrome/browser/policy/configuration_policy_pref_store.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_POLICY_CONFIGURATION_POLICY_PREF_STORE_H_
 #define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PREF_STORE_H_
-#pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/values.h"
 #include "chrome/browser/policy/policy_map.h"
 #include "chrome/browser/policy/policy_service.h"
 #include "chrome/common/pref_store.h"
@@ skipping 59 matching lines @@
   scoped_ptr<PrefValueMap> prefs_;
 
   ObserverList<PrefStore::Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyPrefStore);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PREF_STORE_H_