[Chromoting] Use ProcessStatsSender in DaemonProcess (daemon process)

remoting/host/worker_process_ipc_delegate.h

Index: remoting/host/worker_process_ipc_delegate.h
diff --git a/remoting/host/worker_process_ipc_delegate.h b/remoting/host/worker_process_ipc_delegate.h
index 9ba4cb0fcf338e1dc1217dc123bbedbedd179d8d..7b11de2cb206b8070b2dd51fff31a9713fcbd205 100644
--- a/remoting/host/worker_process_ipc_delegate.h
+++ b/remoting/host/worker_process_ipc_delegate.h
@@ -29,6 +29,9 @@ class WorkerProcessIpcDelegate {
 
   // 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