[rtp_rtcp] rtcp::Sli packet moved into own file and got Parse function

webrtc/modules/rtp_rtcp/source/rtcp_sender.cc

Index: webrtc/modules/rtp_rtcp/source/rtcp_sender.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_sender.cc b/webrtc/modules/rtp_rtcp/source/rtcp_sender.cc
index a4f6f3923b87c5ff4c6eaaf172f8b1509b9b4bb1..7d67c2abb4aacdd25e0b96715b8184b2dfd5a965 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_sender.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_sender.cc
@@ -27,6 +27,7 @@
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/pli.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.h"
+#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/sli.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.h"
 #include "webrtc/system_wrappers/include/critical_section_wrapper.h"
@@ -556,9 +557,7 @@ rtc::scoped_ptr<rtcp::RtcpPacket> RTCPSender::BuildSLI(const RtcpContext& ctx) {
   sli->From(ssrc_);
   sli->To(remote_ssrc_);
   // Crop picture id to 6 least significant bits.
-  sli->WithPictureId(ctx.picture_id_ & 0x3F);
-  sli->WithFirstMb(0);
-  sli->WithNumberOfMb(0x1FFF);  // 13 bits, only ones for now.
+  sli->WithMacroblocks(ctx.picture_id_ & 0x3F, 0, 0x1fff);
 
   return rtc::scoped_ptr<rtcp::Sli>(sli);
 }