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

mojo/services/network/http_server_impl.h

 // Copyright 2015 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_HTTP_SERVER_IMPL_H_
 #define MOJO_SERVICES_NETWORK_HTTP_SERVER_IMPL_H_
 
 #include <map>
 
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
+#include "mojo/application/app_lifetime_helper.h"
 #include "mojo/services/network/public/interfaces/http_server.mojom.h"
 #include "mojo/services/network/public/interfaces/net_address.mojom.h"
 #include "net/server/http_server.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/error_handler.h"
 
 namespace net {
 class HttpServer;
 }
 
 namespace mojo {
 
 class HttpConnectionImpl;
 
 class HttpServerImpl : public net::HttpServer::Delegate,
                        public ErrorHandler {
  public:
   static void Create(
       NetAddressPtr local_address,
       HttpServerDelegatePtr delegate,
+      scoped_ptr<mojo::AppRefCount> app_refcount,
       const Callback<void(NetworkErrorPtr, NetAddressPtr)>& callback);
 
   net::HttpServer* server() { return server_.get(); }
 
  private:
   // The lifetime of the returned HttpServerImpl object is bound to that of
   // |delegate|'s underlying pipe. The object will self-destruct when it is
   // notified that |delegate|'s pipe is closed. Deleting the object directly
   // before that is okay, too.
-  explicit HttpServerImpl(HttpServerDelegatePtr delegate);
+  HttpServerImpl(HttpServerDelegatePtr delegate,
+                 scoped_ptr<mojo::AppRefCount> app_refcount);
   ~HttpServerImpl() override;
 
   int Start(NetAddressPtr local_address);
   NetAddressPtr GetLocalAddress() const;
 
   // net::HttpServer::Delegate implementation.
   void OnConnect(int connection_id) override;
   void OnHttpRequest(int connection_id,
                      const net::HttpServerRequestInfo& info) override;
   void OnWebSocketRequest(int connection_id,
                           const net::HttpServerRequestInfo& info) override;
   void OnWebSocketMessage(int connection_id, const std::string& data) override;
   void OnClose(int connection_id) override;
 
   // ErrorHandler implementation.
   void OnConnectionError() override;
 
   HttpServerDelegatePtr delegate_;
+  scoped_ptr<mojo::AppRefCount> app_refcount_;
   scoped_ptr<net::HttpServer> server_;
 
   std::map<int, linked_ptr<HttpConnectionImpl>> connections_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpServerImpl);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_NETWORK_HTTP_SERVER_IMPL_H_