Privatize StrongBinding lifetime management

device/serial/serial_connection_factory.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_factory.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "device/serial/serial_connection.h"
 #include "device/serial/serial_io_handler.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace device {
 namespace {
 
 void FillDefaultConnectionOptions(serial::ConnectionOptions* options) {
   if (!options->bitrate)
     options->bitrate = 9600;
   if (options->data_bits == serial::DataBits::NONE)
     options->data_bits = serial::DataBits::EIGHT;
   if (options->stop_bits == serial::StopBits::NONE)
@@ skipping 97 matching lines @@
       path_, *options_,
       base::Bind(&SerialConnectionFactory::ConnectTask::OnConnected, this));
 }
 
 void SerialConnectionFactory::ConnectTask::OnConnected(bool success) {
   DCHECK(io_handler_.get());
   if (!success) {
     return;
   }
 
-  new SerialConnection(io_handler_, std::move(sink_), std::move(source_),
-                       mojo::MakeProxy(std::move(source_client_)),
-                       std::move(connection_request_));
+  mojo::MakeStrongBinding(base::MakeUnique<SerialConnection>(
+                              io_handler_, std::move(sink_), std::move(source_),
+                              mojo::MakeProxy(std::move(source_client_))),
+                          std::move(connection_request_));
 }
 
 }  // namespace device