Reland of Add a flags field to video timing extension.

webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h

Index: webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h b/webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h
index 5d5b31b39bc06271bf0ba6b628a263b473099991..d557ecf1025e4549c77542cbcfedbe8bb850a70c 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h
+++ b/webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h
@@ -33,25 +33,25 @@ class RtpPacketToSend : public rtp::Packet {
   void set_packetization_finish_time_ms(int64_t time) {
     SetExtension<VideoTimingExtension>(
         VideoSendTiming::GetDeltaCappedMs(capture_time_ms_, time),
-        VideoSendTiming::kPacketizationFinishDeltaIdx);
+        VideoSendTiming::kPacketizationFinishDeltaOffset);
   }
 
   void set_pacer_exit_time_ms(int64_t time) {
     SetExtension<VideoTimingExtension>(
         VideoSendTiming::GetDeltaCappedMs(capture_time_ms_, time),
-        VideoSendTiming::kPacerExitDeltaIdx);
+        VideoSendTiming::kPacerExitDeltaOffset);
   }
 
   void set_network_time_ms(int64_t time) {
     SetExtension<VideoTimingExtension>(
         VideoSendTiming::GetDeltaCappedMs(capture_time_ms_, time),
-        VideoSendTiming::kNetworkTimestampDeltaIdx);
+        VideoSendTiming::kNetworkTimestampDeltaOffset);
   }
 
   void set_network2_time_ms(int64_t time) {
     SetExtension<VideoTimingExtension>(
         VideoSendTiming::GetDeltaCappedMs(capture_time_ms_, time),
-        VideoSendTiming::kNetwork2TimestampDeltaIdx);
+        VideoSendTiming::kNetwork2TimestampDeltaOffset);
   }
 
  private: