Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/extension_function_registry.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_FUNCTION_REGISTRY_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_REGISTRY_H_
-#pragma once
 
 #include <map>
 #include <string>
 #include <vector>
 
 class ExtensionFunction;
 
 // A factory function for creating new ExtensionFunction instances.
 typedef ExtensionFunction* (*ExtensionFunctionFactory)();
 
@@ skipping 29 matching lines @@
   void RegisterFunction() {
     factories_[T::function_name()] = &NewExtensionFunction<T>;
   }
 
  private:
   typedef std::map<std::string, ExtensionFunctionFactory> FactoryMap;
   FactoryMap factories_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_REGISTRY_H_