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

remoting/host/client_session.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/client_session.h"
 
 #include <algorithm>
 
 #include "base/message_loop/message_loop_proxy.h"
 #include "remoting/base/capabilities.h"
@@ skipping 399 matching lines @@
     const protocol::SessionConfig& config) {
   const protocol::ChannelConfig& video_config = config.video_config();
 
   if (video_config.codec == protocol::ChannelConfig::CODEC_VERBATIM) {
     return scoped_ptr<VideoEncoder>(new remoting::VideoEncoderVerbatim());
   } else if (video_config.codec == protocol::ChannelConfig::CODEC_VP8) {
     return scoped_ptr<VideoEncoder>(new remoting::VideoEncoderVp8());
   }
 
   NOTIMPLEMENTED();
-  return scoped_ptr<VideoEncoder>(NULL);
+  return scoped_ptr<VideoEncoder>();
 }
 
 // static
 scoped_ptr<AudioEncoder> ClientSession::CreateAudioEncoder(
     const protocol::SessionConfig& config) {
   const protocol::ChannelConfig& audio_config = config.audio_config();
 
   if (audio_config.codec == protocol::ChannelConfig::CODEC_VERBATIM) {
     return scoped_ptr<AudioEncoder>(new AudioEncoderVerbatim());
   } else if (audio_config.codec == protocol::ChannelConfig::CODEC_SPEEX) {
     return scoped_ptr<AudioEncoder>(new AudioEncoderSpeex());
   } else if (audio_config.codec == protocol::ChannelConfig::CODEC_OPUS) {
     return scoped_ptr<AudioEncoder>(new AudioEncoderOpus());
   }
 
   NOTIMPLEMENTED();
-  return scoped_ptr<AudioEncoder>(NULL);
+  return scoped_ptr<AudioEncoder>();
 }
 
 }  // namespace remoting