Add opus audio codec support in remoting

remoting/host/client_session.cc

Index: remoting/host/client_session.cc
diff --git a/remoting/host/client_session.cc b/remoting/host/client_session.cc
index 8a9b84295a254909421011425b08d6bddefc407f..67e28ecd72f2bb16f73112d97182b547fe7d59fe 100644
--- a/remoting/host/client_session.cc
+++ b/remoting/host/client_session.cc
@@ -8,6 +8,7 @@
 
 #include "base/message_loop_proxy.h"
 #include "remoting/codec/audio_encoder.h"
+#include "remoting/codec/audio_encoder_opus.h"
 #include "remoting/codec/audio_encoder_speex.h"
 #include "remoting/codec/audio_encoder_verbatim.h"
 #include "remoting/codec/video_encoder.h"
@@ -293,6 +294,8 @@ scoped_ptr<AudioEncoder> ClientSession::CreateAudioEncoder(
     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();