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

remoting/protocol/libjingle_transport_factory.cc

Index: remoting/protocol/libjingle_transport_factory.cc
diff --git a/remoting/protocol/libjingle_transport_factory.cc b/remoting/protocol/libjingle_transport_factory.cc
index b3ee5b8901d8b888127c344372b4c1718b06aa4c..78b30bb54f3127bbd3c6e5aeb574a39441d97659 100644
--- a/remoting/protocol/libjingle_transport_factory.cc
+++ b/remoting/protocol/libjingle_transport_factory.cc
@@ -312,7 +312,7 @@ void LibjingleStreamTransport::NotifyConnectFailed() {
 
   authenticator_.reset();
 
-  NotifyConnected(scoped_ptr<net::StreamSocket>(NULL));
+  NotifyConnected(scoped_ptr<net::StreamSocket>());
 }
 
 }  // namespace
@@ -379,7 +379,7 @@ scoped_ptr<StreamTransport> LibjingleTransportFactory::CreateStreamTransport() {
 scoped_ptr<DatagramTransport>
 LibjingleTransportFactory::CreateDatagramTransport() {
   NOTIMPLEMENTED();
-  return scoped_ptr<DatagramTransport>(NULL);
+  return scoped_ptr<DatagramTransport>();
 }
 
 }  // namespace protocol