Propagate probing cluster id to SendTimeHistory.

webrtc/modules/pacing/packet_router.h

Index: webrtc/modules/pacing/packet_router.h
diff --git a/webrtc/modules/pacing/packet_router.h b/webrtc/modules/pacing/packet_router.h
index 81d85404eeeb03fa87988bf5563af2d20a662522..95d630ace450bcf6bb80a22dd8dc0cb096e918ae 100644
--- a/webrtc/modules/pacing/packet_router.h
+++ b/webrtc/modules/pacing/packet_router.h
@@ -46,7 +46,7 @@ class PacketRouter : public PacedSender::PacketSender,
                         bool retransmission,
                         int probe_cluster_id) override;
 
-  size_t TimeToSendPadding(size_t bytes) override;
+  size_t TimeToSendPadding(size_t bytes, int probe_cluster_id) override;
 
   void SetTransportWideSequenceNumber(uint16_t sequence_number);
   uint16_t AllocateSequenceNumber() override;