Revert of Unify rtcp packet setters

webrtc/modules/rtp_rtcp/source/rtcp_packet/sli.h

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/sli.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/sli.h b/webrtc/modules/rtp_rtcp/source/rtcp_packet/sli.h
index 3214b96dec4b7e20a652993dba9b05fa93d99d56..ce1dfe5bc55c27db684356773c490fe702d784d7 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/sli.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/sli.h
@@ -49,13 +49,11 @@
   // Parse assumes header is already parsed and validated.
   bool Parse(const CommonHeader& packet);
 
-  void AddPictureId(uint8_t picture_id) {
-    items_.emplace_back(picture_id, 0, 0x1fff);
-  }
-  void AddPictureId(uint8_t picture_id,
-                    uint16_t first_macroblock,
-                    uint16_t number_macroblocks) {
-    items_.emplace_back(picture_id, first_macroblock, number_macroblocks);
+  void WithPictureId(uint8_t picture_id,
+                     uint16_t first_macroblock = 0,
+                     uint16_t number_macroblocks = 0x1fff) {
+    items_.push_back(
+        Macroblocks(picture_id, first_macroblock, number_macroblocks));
   }
 
   const std::vector<Macroblocks>& macroblocks() const { return items_; }