Cleanup usage of scoped_ptr<> in remoting for C++11

remoting/host/session_manager_factory.cc

 // Copyright (c) 2012 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 "remoting/host/session_manager_factory.h"
 
 #include "remoting/protocol/chromium_port_allocator.h"
 #include "remoting/protocol/chromium_socket_factory.h"
 #include "remoting/protocol/jingle_session_manager.h"
 #include "remoting/protocol/libjingle_transport_factory.h"
 #include "remoting/protocol/network_settings.h"
 #include "remoting/protocol/session_manager.h"
 
 namespace remoting {
 
 scoped_ptr<protocol::SessionManager> CreateHostSessionManager(
     SignalStrategy* signal_strategy,
     const protocol::NetworkSettings& network_settings,
     const scoped_refptr<net::URLRequestContextGetter>&
         url_request_context_getter) {
   // Use Chrome's network stack to allocate ports for peer-to-peer channels.
   scoped_ptr<protocol::ChromiumPortAllocator> port_allocator(
       protocol::ChromiumPortAllocator::Create(url_request_context_getter,
                                               network_settings));
 
   scoped_ptr<protocol::TransportFactory> transport_factory(
       new protocol::LibjingleTransportFactory(
-          signal_strategy,
-          port_allocator.PassAs<cricket::HttpPortAllocatorBase>(),
-          network_settings));
+          signal_strategy, port_allocator.Pass(), network_settings));
 
   scoped_ptr<protocol::JingleSessionManager> session_manager(
       new protocol::JingleSessionManager(transport_factory.Pass()));
-  return session_manager.PassAs<protocol::SessionManager>();
+  return session_manager.Pass();
 }
 
 } // namespace remoting