Close data pipes when TCP network connection goes down.

mojo/services/network/tcp_connected_socket_impl.h

Index: mojo/services/network/tcp_connected_socket_impl.h
diff --git a/mojo/services/network/tcp_connected_socket_impl.h b/mojo/services/network/tcp_connected_socket_impl.h
index 0eb95e26c7f5d7ce1748badef45822975ceb17f7..10c0c523ef54be54172bc94252c4b34bfb7b8306 100644
--- a/mojo/services/network/tcp_connected_socket_impl.h
+++ b/mojo/services/network/tcp_connected_socket_impl.h
@@ -25,17 +25,27 @@ class TCPConnectedSocketImpl : public InterfaceImpl<TCPConnectedSocket> {
   ~TCPConnectedSocketImpl() override;
 
  private:
+  enum Direction {
+    SEND,
+    RECEIVE,
+  };
+
   // "Receiving" in this context means reading from TCPSocket and writing to
   // the Mojo receive_stream.
   void ReceiveMore();
   void OnReceiveStreamReady(MojoResult result);
   void DidReceive(bool completed_synchronously, int result);
+  void ShutdownReceive();
 
   // "Writing" is reading from the Mojo send_stream and writing to the
   // TCPSocket.
   void SendMore();
   void OnSendStreamReady(MojoResult result);
   void DidSend(bool completed_asynchronously, int result);
+  void ShutdownSend();
+
+  // Notify that socket direction has been closed.
+  void NotifyClose(Direction direction, int net_result, MojoResult mojo_result);
 
   scoped_ptr<net::TCPSocket> socket_;