Add basic TCP socket mojo implementation

mojo/services/network/tcp_bound_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_BOUND_SOCKET_H_
 #define MOJO_SERVICES_NETWORK_TCP_BOUND_SOCKET_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "mojo/public/cpp/bindings/interface_impl.h"
 #include "mojo/services/public/interfaces/network/tcp_bound_socket.mojom.h"
 #include "net/socket/tcp_socket.h"
 
 namespace mojo {
 
 class TCPBoundSocketImpl : public InterfaceImpl<TCPBoundSocket> {
  public:
   TCPBoundSocketImpl();
   virtual ~TCPBoundSocketImpl();
 
+  // Does the actual binding. Returns a net error code. On net::OK, the bound
+  // socket will be ready to use and send back to the client. On failure, this
+  // object should be destroyed and no longer used.
   int Bind(NetAddressPtr local_address);
 
   // Returns the local address associated with this socket. This should only
   // be called after Bind has succeeded.
   NetAddressPtr GetLocalAddress() const;
 
   // TCPBoundSocket.
   virtual void StartListening(
       InterfaceRequest<TCPServerSocket> server,
       const Callback<void(NetworkErrorPtr)>& callback) override;
   virtual void Connect(
       NetAddressPtr remote_address,
       ScopedDataPipeConsumerHandle send_stream,
       ScopedDataPipeProducerHandle receive_stream,
       InterfaceRequest<TCPConnectedSocket> client_socket,
       const Callback<void(NetworkErrorPtr)>& callback) override;
 
  private:
+  void OnConnected(int result);
+
   scoped_ptr<net::TCPSocket> socket_;
+
+  // Valid when waiting for a connect callback.
+  ScopedDataPipeConsumerHandle pending_connect_send_stream_;
+  ScopedDataPipeProducerHandle pending_connect_receive_stream_;
+  InterfaceRequest<TCPConnectedSocket> pending_connect_socket_;
+  Callback<void(NetworkErrorPtr)> pending_connect_callback_;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_NETWORK_TCP_BOUND_SOCKET_H_