Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/extension_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_EXTENSIONS_EXTENSION_PREF_STORE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PREF_STORE_H_
-#pragma once
 
 #include <string>
 
 #include "base/time.h"
 #include "chrome/browser/extensions/extension_pref_value_map.h"
 #include "chrome/browser/prefs/value_map_pref_store.h"
 
 // A (non-persistent) PrefStore implementation that holds effective preferences
 // set by extensions. These preferences are managed by and fetched from an
 // ExtensionPrefValueMap.
@@ skipping 13 matching lines @@
   virtual ~ExtensionPrefStore();
 
  private:
   ExtensionPrefValueMap* extension_pref_value_map_;  // Weak pointer.
   bool incognito_pref_store_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefStore);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREF_STORE_H_