Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/api/socket/tcp_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_TCP_SOCKET_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SOCKET_TCP_SOCKET_H_
-#pragma once
 
 #include <string>
 
 #include "chrome/browser/extensions/api/socket/socket.h"
 
 // This looks like it should be forward-declarable, but it does some tricky
 // moves that make it easier to just include it.
 #include "net/socket/tcp_client_socket.h"
 
 namespace net {
@@ skipping 46 matching lines @@
   scoped_ptr<net::TCPClientSocket> socket_;
 
   CompletionCallback connect_callback_;
 
   ReadCompletionCallback read_callback_;
 };
 
 }  //  namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SOCKET_TCP_SOCKET_H_