Delete support for sending RTCP RPSI and SLI messages.

webrtc/modules/rtp_rtcp/source/rtcp_sender.h

Index: webrtc/modules/rtp_rtcp/source/rtcp_sender.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_sender.h b/webrtc/modules/rtp_rtcp/source/rtcp_sender.h
index 76abf63853d03fd4657bf893dfb3f7361c63f588..c9088c7b97231204f3ba6d1d2b15dc57ec1984f8 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_sender.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_sender.h
@@ -112,14 +112,12 @@ class RTCPSender {
   int32_t SendRTCP(const FeedbackState& feedback_state,
                    RTCPPacketType packetType,
                    int32_t nackSize = 0,
-                   const uint16_t* nackList = 0,
-                   uint64_t pictureID = 0);
+                   const uint16_t* nackList = 0);
 
   int32_t SendCompoundRTCP(const FeedbackState& feedback_state,
                            const std::set<RTCPPacketType>& packetTypes,
                            int32_t nackSize = 0,
-                           const uint16_t* nackList = 0,
-                           uint64_t pictureID = 0);
+                           const uint16_t* nackList = 0);
 
   bool REMB() const;
 
@@ -186,10 +184,6 @@ class RTCPSender {
       EXCLUSIVE_LOCKS_REQUIRED(critical_section_rtcp_sender_);
   std::unique_ptr<rtcp::RtcpPacket> BuildFIR(const RtcpContext& context)
       EXCLUSIVE_LOCKS_REQUIRED(critical_section_rtcp_sender_);
-  std::unique_ptr<rtcp::RtcpPacket> BuildSLI(const RtcpContext& context)
-      EXCLUSIVE_LOCKS_REQUIRED(critical_section_rtcp_sender_);
-  std::unique_ptr<rtcp::RtcpPacket> BuildRPSI(const RtcpContext& context)
-      EXCLUSIVE_LOCKS_REQUIRED(critical_section_rtcp_sender_);
   std::unique_ptr<rtcp::RtcpPacket> BuildNACK(const RtcpContext& context)
       EXCLUSIVE_LOCKS_REQUIRED(critical_section_rtcp_sender_);