Remove #pragma once from jingle

jingle/notifier/base/proxy_resolving_client_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.
 //
 // This StreamSocket implementation wraps a ClientSocketHandle that is created
 // from the client socket pool after resolving proxies.
 
 #ifndef JINGLE_NOTIFIER_BASE_PROXY_RESOLVING_CLIENT_SOCKET_H_
 #define JINGLE_NOTIFIER_BASE_PROXY_RESOLVING_CLIENT_SOCKET_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/completion_callback.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_log.h"
 #include "net/base/ssl_config_service.h"
@@ skipping 75 matching lines @@
   net::BoundNetLog bound_net_log_;
   base::WeakPtrFactory<ProxyResolvingClientSocket> weak_factory_;
 
   // The callback passed to Connect().
   net::CompletionCallback user_connect_callback_;
 };
 
 }  // namespace notifier
 
 #endif  // JINGLE_NOTIFIER_BASE_PROXY_RESOLVING_CLIENT_SOCKET_H_