Only return Rtx mode in RTXSendStatus().

There is no need to return 'ssrc' and 'payloadtype' inside this function
since they are never used.

BUG=
R=pbos@webrtc.org, stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/38569004

Patch from Changbin Shao <changbin.shao@intel.com>.

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@8049 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/modules/rtp_rtcp/source/nack_rtx_unittest.cc b/modules/rtp_rtcp/source/nack_rtx_unittest.cc
index bfe0af0..89fa3e6 100644
--- a/modules/rtp_rtcp/source/nack_rtx_unittest.cc
+++ b/modules/rtp_rtcp/source/nack_rtx_unittest.cc
@@ -259,7 +259,7 @@
 
   void RunRtxTest(RtxMode rtx_method, int loss) {
     rtp_payload_registry_.SetRtxSsrc(kTestSsrc + 1);
-    rtp_rtcp_module_->SetRTXSendStatus(rtx_method);
+    rtp_rtcp_module_->SetRtxSendStatus(rtx_method);
     rtp_rtcp_module_->SetRtxSsrc(kTestSsrc + 1);
     transport_.DropEveryNthPacket(loss);
     uint32_t timestamp = 3000;