Pass SessionConfig by reference instead of pointer.

remoting/protocol/video_writer.cc

Index: remoting/protocol/video_writer.cc
diff --git a/remoting/protocol/video_writer.cc b/remoting/protocol/video_writer.cc
index f0d4a537ca3690f6e387a773a26a94f8cf48b2f0..8ebf2850832960b034d74e55cf6cfc820c77a9a9 100644
--- a/remoting/protocol/video_writer.cc
+++ b/remoting/protocol/video_writer.cc
@@ -15,8 +15,8 @@ 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) {