Eliminate mojo::Shell client lib class

mojo/services/network/tcp_server_socket_impl.h

 // Copyright 2014 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 MOJO_SERVICES_NETWORK_TCP_SERVER_SOCKET_H_
 #define MOJO_SERVICES_NETWORK_TCP_SERVER_SOCKET_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 #include "mojo/services/network/public/interfaces/tcp_server_socket.mojom.h"
-#include "mojo/shell/public/cpp/shell.h"
+#include "mojo/shell/public/cpp/message_loop_ref.h"
 #include "net/base/ip_endpoint.h"
 #include "net/socket/tcp_socket.h"
 
 namespace mojo {
 
 class TCPServerSocketImpl : public TCPServerSocket {
  public:
   typedef Callback<void(NetworkErrorPtr, NetAddressPtr)> AcceptCallback;
 
   // Passed ownership of a socket already in listening mode.
   TCPServerSocketImpl(scoped_ptr<net::TCPSocket> socket,
-                      scoped_ptr<mojo::AppRefCount> app_refcount,
+                      scoped_ptr<mojo::MessageLoopRef> app_refcount,
                       InterfaceRequest<TCPServerSocket> request);
   ~TCPServerSocketImpl() override;
 
   // TCPServerSocket.
   void Accept(ScopedDataPipeConsumerHandle send_stream,
               ScopedDataPipeProducerHandle receive_stream,
               InterfaceRequest<TCPConnectedSocket> client_socket,
               const AcceptCallback& callback) override;
 
  private:
   void OnAcceptCompleted(int result);
 
   scoped_ptr<net::TCPSocket> socket_;
 
   // Non-null when accept is pending.
   AcceptCallback pending_callback_;
 
   // The parameters associated with the pending Accept call.
   ScopedDataPipeConsumerHandle pending_send_stream_;
   ScopedDataPipeProducerHandle pending_receive_stream_;
   InterfaceRequest<TCPConnectedSocket> pending_client_socket_;
 
   // These are written to by net::TCPSocket when Accept is completed.
   scoped_ptr<net::TCPSocket> accepted_socket_;
   net::IPEndPoint accepted_address_;
 
-  scoped_ptr<mojo::AppRefCount> app_refcount_;
+  scoped_ptr<mojo::MessageLoopRef> app_refcount_;
   StrongBinding<TCPServerSocket> binding_;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_NETWORK_TCP_SERVER_SOCKET_H_