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

talk/app/webrtc/webrtcsession.cc

Index: talk/app/webrtc/webrtcsession.cc
diff --git a/talk/app/webrtc/webrtcsession.cc b/talk/app/webrtc/webrtcsession.cc
index 7241abf3cda5cdfc8e2b6052daba4a3b4d8d25d2..06b7f6bc21318d4dd3dd860e506b3444fd9f2cb2 100644
--- a/talk/app/webrtc/webrtcsession.cc
+++ b/talk/app/webrtc/webrtcsession.cc
@@ -1258,7 +1258,7 @@ void WebRtcSession::SetAudioSend(uint32 ssrc, bool enable,
     LOG(LS_ERROR) << "SetAudioSend: No audio channel exists.";
     return;
   }
-  if (!voice_channel_->SetAudioSend(ssrc, !enable, &options, renderer)) {
+  if (!voice_channel_->SetAudioSend(ssrc, enable, &options, renderer)) {
     LOG(LS_ERROR) << "SetAudioSend: ssrc is incorrect: " << ssrc;
   }
 }
@@ -1319,7 +1319,7 @@ void WebRtcSession::SetVideoSend(uint32 ssrc, bool enable,
     LOG(LS_WARNING) << "SetVideoSend: No video channel exists.";
     return;
   }
-  if (!video_channel_->SetVideoSend(ssrc, !enable, options)) {
+  if (!video_channel_->SetVideoSend(ssrc, enable, options)) {
     // Allow that MuteStream fail if |enable| is false but assert otherwise.
     // This in the normal case when the underlying media channel has already
     // been deleted.