Remove #pragma once from chrome/browser/{printing,safe_browsing,prefs,bookmarks,autocomplete}

chrome/browser/prefs/pref_set_observer.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_PREFS_PREF_SET_OBSERVER_H_
 #define CHROME_BROWSER_PREFS_PREF_SET_OBSERVER_H_
-#pragma once
 
 #include <set>
 
 #include "base/basictypes.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "content/public/browser/notification_observer.h"
 
 // Observes the state of a set of preferences and allows to query their combined
 // managed bits.
@@ skipping 34 matching lines @@
   PrefSet prefs_;
 
   PrefService* pref_service_;
   PrefChangeRegistrar registrar_;
   content::NotificationObserver* observer_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefSetObserver);
 };
 
 #endif  // CHROME_BROWSER_PREFS_PREF_SET_OBSERVER_H_