Refactor WVoE DTMF handling #1

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 111a76cf23774081d00ee26e731e41403fc5ef32..33c818da9919785f37de4bd293319eda4aea2ba5 100644
--- a/talk/app/webrtc/webrtcsession.cc
+++ b/talk/app/webrtc/webrtcsession.cc
@@ -1403,8 +1403,7 @@ bool WebRtcSession::InsertDtmf(const std::string& track_id,
     LOG(LS_ERROR) << "InsertDtmf: Track does not exist: " << track_id;
     return false;
   }
-  if (!voice_channel_->InsertDtmf(send_ssrc, code, duration,
-                                  cricket::DF_SEND)) {
+  if (!voice_channel_->InsertDtmf(send_ssrc, code, duration)) {
     LOG(LS_ERROR) << "Failed to insert DTMF to channel.";
     return false;
   }