Pass SessionConfig by reference instead of pointer.

remoting/protocol/video_writer.cc

 // Copyright (c) 2010 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/video_writer.h"
 
 #include "remoting/protocol/session_config.h"
 #include "remoting/protocol/protobuf_video_writer.h"
 #include "remoting/protocol/rtp_video_writer.h"
 
 namespace remoting {
 namespace protocol {
 
 VideoWriter::~VideoWriter() { }
 
 // static
 VideoWriter* VideoWriter::Create(base::MessageLoopProxy* message_loop,
-                                 const SessionConfig* config) {
-  const ChannelConfig& video_config = config->video_config();
+                                 const SessionConfig& config) {
+  const ChannelConfig& video_config = config.video_config();
   if (video_config.transport == ChannelConfig::TRANSPORT_SRTP) {
     return new RtpVideoWriter(message_loop);
   } else if (video_config.transport == ChannelConfig::TRANSPORT_STREAM) {
     return new ProtobufVideoWriter(message_loop);
   }
   return NULL;
 }
 
 }  // namespace protocol
 }  // namespace remoting