Add SetReportBlocks to rtcp Sender/Receive Report classes.

webrtc/modules/rtp_rtcp/source/rtcp_packet/sender_report.cc

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/sender_report.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/sender_report.cc b/webrtc/modules/rtp_rtcp/source/rtcp_packet/sender_report.cc
index 59c08c3c66ef093761f7f32fab79a3efaf2720f4..93aa5a6ac650bbac54f393f62fe910363a6e0943 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/sender_report.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/sender_report.cc
@@ -10,6 +10,8 @@
 
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/sender_report.h"
 
+#include <utility>
+
 #include "webrtc/modules/rtp_rtcp/source/byte_io.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/common_header.h"
 #include "webrtc/rtc_base/checks.h"
@@ -122,5 +124,15 @@ bool SenderReport::AddReportBlock(const ReportBlock& block) {
   return true;
 }
 
+bool SenderReport::SetReportBlocks(std::vector<ReportBlock> blocks) {
+  if (blocks.size() > kMaxNumberOfReportBlocks) {
+    LOG(LS_WARNING) << "Too many report blocks (" << blocks.size()
+                    << ") for sender report.";
+    return false;
+  }
+  report_blocks_ = std::move(blocks);
+  return true;
+}
+
 }  // namespace rtcp
 }  // namespace webrtc