Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/extension_creator.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_CREATOR_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_CREATOR_H_
-#pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 
 namespace crypto {
 class RSAPrivateKey;
 }
 
@@ skipping 71 matching lines @@
   // Holds a message for any error that is raised during Run(...).
   std::string error_message_;
 
   // Type of error that was raised, if any.
   ErrorType error_type_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionCreator);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_CREATOR_H_