Change 'mute' parameter of MediaChannel::SetAudioSend()/SetVideoSend() to 'enable'.

talk/session/media/channel.cc

Index: talk/session/media/channel.cc
diff --git a/talk/session/media/channel.cc b/talk/session/media/channel.cc
index 56209800fa7eddb8ecd4fd01e26d2f86bbf6a137..6eb9b580baef8431abf5b45afc3c6fe00168b7cf 100644
--- a/talk/session/media/channel.cc
+++ b/talk/session/media/channel.cc
@@ -1314,11 +1314,11 @@ bool VoiceChannel::SetRemoteRenderer(uint32 ssrc, AudioRenderer* renderer) {
 }
 
 bool VoiceChannel::SetAudioSend(uint32 ssrc,
-                                bool mute,
+                                bool enable,
                                 const AudioOptions* options,
                                 AudioRenderer* renderer) {
   return InvokeOnWorker(Bind(&VoiceMediaChannel::SetAudioSend, media_channel(),
-                             ssrc, mute, options, renderer));
+                             ssrc, enable, options, renderer));
 }
 
 // TODO(juberti): Handle early media the right way. We should get an explicit