Cast Extensions API: Factory method for creating a cast session

chrome/renderer/media/cast_udp_transport.cc

 // Copyright 2013 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 "chrome/renderer/media/cast_udp_transport.h"
 
 #include "base/logging.h"
 #include "chrome/renderer/media/cast_session.h"
 
-CastUdpTransport::CastUdpTransport()
-    : cast_session_(new CastSession()) {
+CastUdpTransport::CastUdpTransport(
+    const scoped_refptr<CastSession>& session)
+    : cast_session_(session) {
 }
 
 CastUdpTransport::~CastUdpTransport() {
 }
 
 void CastUdpTransport::Start(const net::HostPortPair& remote_address) {
   NOTIMPLEMENTED();
 }