Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/extension_creator_filter.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_BROWSER_EXTENSIONS_EXTENSION_CREATOR_FILTER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_CREATOR_FILTER_H_
-#pragma once
 
 #include "base/memory/ref_counted.h"
 
 class FilePath;
 
 // Determines which files should be included in a packaged extension.
 // Designed specifically to operate with the callback in chrome/common/zip.
 class ExtensionCreatorFilter
       : public base::RefCounted<ExtensionCreatorFilter> {
  public:
   ExtensionCreatorFilter() {}
 
   // Returns true if the given FilePath should be included in a
   // packed extension.
   bool ShouldPackageFile(const FilePath& file_path);
 
  private:
   friend class base::RefCounted<ExtensionCreatorFilter>;
   ~ExtensionCreatorFilter() {}
   DISALLOW_COPY_AND_ASSIGN(ExtensionCreatorFilter);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_CREATOR_FILTER_H_