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

mojo/services/network/udp_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_UDP_SOCKET_IMPL_H_
 #define MOJO_SERVICES_NETWORK_UDP_SOCKET_IMPL_H_
 
 #include <deque>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "mojo/application/app_lifetime_helper.h"
 #include "mojo/services/network/public/interfaces/udp_socket.mojom.h"
 #include "net/base/ip_endpoint.h"
 #include "net/udp/udp_socket.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/interface_impl.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
 
 namespace net {
 class IOBuffer;
 class IOBufferWithSize;
 }
 
 namespace mojo {
 
 class UDPSocketImpl : public UDPSocket {
  public:
   // The lifetime of a new UDPSocketImpl is bound to the connection associated
   // with |request|.
-  explicit UDPSocketImpl(InterfaceRequest<UDPSocket> request);
+  UDPSocketImpl(InterfaceRequest<UDPSocket> request,
+                scoped_ptr<mojo::AppRefCount> app_refcount);
   ~UDPSocketImpl() override;
 
   // UDPSocket implementation.
   void AllowAddressReuse(
       const Callback<void(NetworkErrorPtr)>& callback) override;
 
   void Bind(NetAddressPtr addr,
             const Callback<void(NetworkErrorPtr,
                                 NetAddressPtr,
                                 InterfaceRequest<UDPSocketReceiver>)>& callback)
@@ skipping 72 matching lines @@
   UDPSocketReceiverPtr receiver_;
 
   // How many more packets the client side expects to receive.
   size_t remaining_recv_slots_;
 
   // The queue owns the PendingSendRequest instances.
   std::deque<PendingSendRequest*> pending_send_requests_;
   // The maximum size of the |pending_send_requests_| queue.
   size_t max_pending_send_requests_;
 
+  scoped_ptr<mojo::AppRefCount> app_refcount_;
+
   DISALLOW_COPY_AND_ASSIGN(UDPSocketImpl);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_NETWORK_UDP_SOCKET_IMPL_H_