Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/api/socket/socket.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_API_SOCKET_SOCKET_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SOCKET_SOCKET_H_
-#pragma once
 
 #include <queue>
 #include <string>
 #include <utility>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/extensions/api/api_resource.h"
 #include "net/base/completion_callback.h"
 #include "net/base/io_buffer.h"
@@ skipping 84 matching lines @@
     CompletionCallback callback;
     int bytes_written;
   };
   std::queue<WriteRequest> write_queue_;
   scoped_refptr<net::IOBuffer> io_buffer_write_;
 };
 
 }  //  namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SOCKET_SOCKET_H_