Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/test_extension_prefs.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_TEST_EXTENSION_PREFS_H_
 #define CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_PREFS_H_
-#pragma once
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/scoped_temp_dir.h"
 #include "chrome/common/extensions/extension.h"
 
 class ExtensionPrefValueMap;
 class PrefService;
 
@@ skipping 61 matching lines @@
   scoped_ptr<ExtensionPrefValueMap> extension_pref_value_map_;
 
  private:
   bool extensions_disabled_;
   DISALLOW_COPY_AND_ASSIGN(TestExtensionPrefs);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_PREFS_H_