Remove OnLocalSsrcChanged and rename EncoderStateFeedback.

webrtc/modules/rtp_rtcp/test/testAPI/test_api_rtcp.cc

Index: webrtc/modules/rtp_rtcp/test/testAPI/test_api_rtcp.cc
diff --git a/webrtc/modules/rtp_rtcp/test/testAPI/test_api_rtcp.cc b/webrtc/modules/rtp_rtcp/test/testAPI/test_api_rtcp.cc
index ee0707a5dc93c54f66ce057ed9ef001250c9a985..63fa830cc4c04db5e0d2a51e8df709f729591495 100644
--- a/webrtc/modules/rtp_rtcp/test/testAPI/test_api_rtcp.cc
+++ b/webrtc/modules/rtp_rtcp/test/testAPI/test_api_rtcp.cc
@@ -46,7 +46,6 @@ class RtcpCallback : public RtcpIntraFrameObserver {
                               uint64_t pictureId) {
     EXPECT_EQ(kTestPictureId, pictureId);
   }
-  virtual void OnLocalSsrcChanged(uint32_t old_ssrc, uint32_t new_ssrc) {}
 
  private:
   RtpRtcp* _rtpRtcpModule;