Add opus audio codec support in remoting

remoting/codec/audio_decoder.cc

Index: remoting/codec/audio_decoder.cc
diff --git a/remoting/codec/audio_decoder.cc b/remoting/codec/audio_decoder.cc
index 6e6a68672ce873b71e0bfb8f86ad210bb49c8c4b..3dc70c30276561794ed2df2dc4a5b72bf4630898 100644
--- a/remoting/codec/audio_decoder.cc
+++ b/remoting/codec/audio_decoder.cc
@@ -5,6 +5,7 @@
 #include "remoting/codec/audio_decoder.h"
 
 #include "base/logging.h"
+#include "remoting/codec/audio_decoder_opus.h"
 #include "remoting/codec/audio_decoder_speex.h"
 #include "remoting/codec/audio_decoder_verbatim.h"
 #include "remoting/protocol/session_config.h"
@@ -17,6 +18,8 @@ scoped_ptr<AudioDecoder> AudioDecoder::CreateAudioDecoder(
 
   if (audio_config.codec == protocol::ChannelConfig::CODEC_VERBATIM) {
     return scoped_ptr<AudioDecoder>(new AudioDecoderVerbatim());
+  } else if (audio_config.codec == protocol::ChannelConfig::CODEC_OPUS) {
+    return scoped_ptr<AudioDecoder>(new AudioDecoderOpus());
   } else if (audio_config.codec == protocol::ChannelConfig::CODEC_SPEEX) {
     return scoped_ptr<AudioDecoder>(new AudioDecoderSpeex());
   }