Extend packet_id to 64 bits in SentPacket and PacketOptions to support QUIC
packet numbers.

Bug: webrtc:9103
Change-Id: Iff85a9523b2890254c295d1e88b93c2e80ff8e17
Reviewed-on: https://webrtc-review.googlesource.com/72261
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
Reviewed-by: Qingsi Wang <qingsi@webrtc.org>
Commit-Queue: Bjorn Mellem <mellem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23043}
diff --git a/rtc_base/socket.h b/rtc_base/socket.h
index d735d3f..ee2c73f 100644
--- a/rtc_base/socket.h
+++ b/rtc_base/socket.h
@@ -158,10 +158,12 @@
 
 struct SentPacket {
   SentPacket();
-  SentPacket(int packet_id, int64_t send_time_ms);
-  SentPacket(int packet_id, int64_t send_time_ms, const rtc::PacketInfo& info);
+  SentPacket(int64_t packet_id, int64_t send_time_ms);
+  SentPacket(int64_t packet_id,
+             int64_t send_time_ms,
+             const rtc::PacketInfo& info);
 
-  int packet_id = -1;
+  int64_t packet_id = -1;
   int64_t send_time_ms = -1;
   rtc::PacketInfo info;
 };