Unwrap picture ids in the RtpFrameReferencerFinder.

webrtc/video/rtp_video_stream_receiver.cc

Index: webrtc/video/rtp_video_stream_receiver.cc
diff --git a/webrtc/video/rtp_video_stream_receiver.cc b/webrtc/video/rtp_video_stream_receiver.cc
index d4464ac21dd568d29b249d282cee90fb19661185..a3018424a54c53267abc79a3d8938cdfb7257b14 100644
--- a/webrtc/video/rtp_video_stream_receiver.cc
+++ b/webrtc/video/rtp_video_stream_receiver.cc
@@ -597,7 +597,7 @@ bool RtpVideoStreamReceiver::DeliverRtcp(const uint8_t* rtcp_packet,
   return true;
 }
 
-void RtpVideoStreamReceiver::FrameContinuous(uint16_t picture_id) {
+void RtpVideoStreamReceiver::FrameContinuous(int64_t picture_id) {
   if (!nack_module_)
     return;
 
@@ -612,7 +612,7 @@ void RtpVideoStreamReceiver::FrameContinuous(uint16_t picture_id) {
     nack_module_->ClearUpTo(seq_num);
 }
 
-void RtpVideoStreamReceiver::FrameDecoded(uint16_t picture_id) {
+void RtpVideoStreamReceiver::FrameDecoded(int64_t picture_id) {
   int seq_num = -1;
   {
     rtc::CritScope lock(&last_seq_num_cs_);