[Chromoting] Use ProcessStatsSender in DaemonProcess (daemon process)

remoting/host/worker_process_ipc_delegate.h

 // Copyright (c) 2012 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 REMOTING_HOST_WORKER_PROCESS_IPC_DELEGATE_H_
 #define REMOTING_HOST_WORKER_PROCESS_IPC_DELEGATE_H_
 
 #include <stdint.h>
 
 #include "base/compiler_specific.h"
@@ skipping 11 matching lines @@
   virtual ~WorkerProcessIpcDelegate() {}
 
   // Notifies that a client has been connected to the channel.
   virtual void OnChannelConnected(int32_t peer_pid) = 0;
 
   // Processes messages sent by the client.
   virtual bool OnMessageReceived(const IPC::Message& message) = 0;
 
   // Notifies that a permanent error was encountered.
   virtual void OnPermanentError(int exit_code) = 0;
+
+  // Notifies that the worker process stops for any reason.

[joedow, 2017/06/23 18:03:08]

Wouldn't we know this because the IPC channel gets disconnected?  I'm not sure
that this method is necessary.

Seeing the additional changes makes me think that using the Daemon process (or
network process) with process IDs is a much simpler approach.

[Hzj_jie, 2017/06/24 00:51:40]

I do not think the disconnecting event has been sent to WorkerProcessIpcDelegate
/ DaemonProcess. DaemonProcess does not own the IPC channel to the worker
process AFAIK.

+  virtual void OnWorkerProcessStopped(int exit_code) = 0;
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_WORKER_PROCESS_IPC_DELEGATE_H_