Making Mandoline apps notice when all the objects they vended are gone so that it can terminate.

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/application/app_lifetime_helper.h"
 #include "mojo/services/network/public/interfaces/tcp_bound_socket.mojom.h"
 #include "net/socket/tcp_socket.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/interface_impl.h"
 
 namespace mojo {
 
 class TCPBoundSocketImpl : public InterfaceImpl<TCPBoundSocket> {
  public:
-  TCPBoundSocketImpl();
+  explicit TCPBoundSocketImpl(scoped_ptr<mojo::AppRefCount> app_refcount);
   ~TCPBoundSocketImpl() override;
 
   // 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;
@@ skipping 10 matching lines @@
  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_;
+  scoped_ptr<mojo::AppRefCount> app_refcount_;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_NETWORK_TCP_BOUND_SOCKET_H_