[Chromoting] Use ProcessStatsSender in host process

remoting/protocol/connection_to_client.h

Index: remoting/protocol/connection_to_client.h
diff --git a/remoting/protocol/connection_to_client.h b/remoting/protocol/connection_to_client.h
index 269411704d314086ee12b0bbb8558281c7a115ce..db7bcb64c36100c297f77c579a6c9be6ce236b79 100644
--- a/remoting/protocol/connection_to_client.h
+++ b/remoting/protocol/connection_to_client.h
@@ -25,6 +25,7 @@ class ClientStub;
 class ClipboardStub;
 class HostStub;
 class InputStub;
+class ProcessStatsStub;
 class Session;
 class VideoStream;
 
@@ -89,6 +90,10 @@ class ConnectionToClient {
   // after OnConnectionClosed().
   virtual ClientStub* client_stub() = 0;
 
+  // The process stats stub used by the host to send process usage data to the
+  // client. The stub may be nullptr.
+  virtual ProcessStatsStub* stats_stub() = 0;
+
   // Set the stubs which will handle messages we receive from the client. These
   // must be called in EventHandler::OnConnectionAuthenticated().
   virtual void set_clipboard_stub(ClipboardStub* clipboard_stub) = 0;