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

mojo/services/network/web_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_WEB_SOCKET_IMPL_H_
 #define MOJO_SERVICES_NETWORK_WEB_SOCKET_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
+#include "mojo/application/app_lifetime_helper.h"
 #include "mojo/services/network/public/interfaces/web_socket.mojom.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/interface_impl.h"
 
 namespace net {
 class WebSocketChannel;
 }  // namespace net
 
 namespace mojo {
 class NetworkContext;
 class WebSocketReadQueue;
 
 // Forms a bridge between the WebSocket mojo interface and the net::WebSocket
 // implementation.
 class WebSocketImpl : public InterfaceImpl<WebSocket> {
  public:
-  explicit WebSocketImpl(NetworkContext* context);
+  WebSocketImpl(NetworkContext* context,
+                scoped_ptr<mojo::AppRefCount> app_refcount);
   ~WebSocketImpl() override;
 
  private:
   // WebSocket methods:
   void Connect(const String& url,
                Array<String> protocols,
                const String& origin,
                ScopedDataPipeConsumerHandle send_stream,
                WebSocketClientPtr client) override;
   void Send(bool fin, WebSocket::MessageType type, uint32_t num_bytes) override;
   void FlowControl(int64_t quota) override;
   void Close(uint16_t code, const String& reason) override;
 
   // Called with the data to send once it has been read from |send_stream_|.
   void DidReadFromSendStream(bool fin,
                              WebSocket::MessageType type,
                              uint32_t num_bytes,
                              const char* data);
 
   // The channel we use to send events to the network.
   scoped_ptr<net::WebSocketChannel> channel_;
   ScopedDataPipeConsumerHandle send_stream_;
   scoped_ptr<WebSocketReadQueue> read_queue_;
   NetworkContext* context_;
+  scoped_ptr<mojo::AppRefCount> app_refcount_;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_NETWORK_WEB_SOCKET_IMPL_H_