Rewrite scoped_ptr<T>(NULL) to use the default ctor in remoting/.

remoting/protocol/libjingle_transport_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/protocol/libjingle_transport_factory.h"
 
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "jingle/glue/channel_socket_adapter.h"
 #include "jingle/glue/pseudotcp_adapter.h"
@@ skipping 294 matching lines @@
 
   // This method may be called in response to a libjingle signal, so
   // libjingle objects must be deleted asynchronously.
   if (channel_.get()) {
     base::ThreadTaskRunnerHandle::Get()->DeleteSoon(
         FROM_HERE, channel_.release());
   }
 
   authenticator_.reset();
 
-  NotifyConnected(scoped_ptr<net::StreamSocket>(NULL));
+  NotifyConnected(scoped_ptr<net::StreamSocket>());
 }
 
 }  // namespace
 
 LibjingleTransportFactory::LibjingleTransportFactory(
     scoped_ptr<cricket::HttpPortAllocatorBase> port_allocator,
     bool incoming_only)
     : http_port_allocator_(port_allocator.get()),
       port_allocator_(port_allocator.Pass()),
       incoming_only_(incoming_only) {
@@ skipping 46 matching lines @@
 }
 
 scoped_ptr<StreamTransport> LibjingleTransportFactory::CreateStreamTransport() {
   return scoped_ptr<StreamTransport>(
       new LibjingleStreamTransport(port_allocator_.get(), incoming_only_));
 }
 
 scoped_ptr<DatagramTransport>
 LibjingleTransportFactory::CreateDatagramTransport() {
   NOTIMPLEMENTED();
-  return scoped_ptr<DatagramTransport>(NULL);
+  return scoped_ptr<DatagramTransport>();
 }
 
 }  // namespace protocol
 }  // namespace remoting