Mojo: Use InterfaceFactory<Interface> for service registration

device/serial/serial_connection.cc

 // 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.
 
 #include "device/serial/serial_connection.h"
 
 #include "device/serial/serial_io_handler.h"
 
 namespace device {
 
@@ skipping 24 matching lines @@
 
 void SerialConnection::GetControlSignals(
     const mojo::Callback<void(serial::DeviceControlSignalsPtr)>& callback) {
   callback.Run(io_handler_->GetControlSignals());
 }
 
 void SerialConnection::Flush(const mojo::Callback<void(bool)>& callback) {
   callback.Run(io_handler_->Flush());
 }
 
-void SerialConnection::OnConnectionError() {
-  delete this;
-}
-
 }  // namespace device