Adds dynamic setting of FEC group size based on the connection's current

net/quic/quic_packet_creator.h

Index: net/quic/quic_packet_creator.h
diff --git a/net/quic/quic_packet_creator.h b/net/quic/quic_packet_creator.h
index ecab1e6d745a2d2f8508102d845bf12c5348928b..cd6c587277d00b7a7d4621d76b8a3afc8091e8cb 100644
--- a/net/quic/quic_packet_creator.h
+++ b/net/quic/quic_packet_creator.h
@@ -225,11 +225,10 @@ class NET_EXPORT_PRIVATE QuicPacketCreator : public QuicFecBuilderInterface {
   }
 
   // Sets creator's max number of packets covered by an FEC group.
-  void set_max_packets_per_fec_group(size_t max_packets_per_fec_group) {
-    // To turn off FEC protection, use StopFecProtectingPackets().
-    DCHECK_NE(0u, max_packets_per_fec_group);
-    max_packets_per_fec_group_ = max_packets_per_fec_group;
-  }
+  // Note: While there are no constraints on |max_packets_per_fec_group|,
+  // this setter enforces a min value of kLowestMaxPacketsPerFecGroup.
+  // To turn off FEC protection, use StopFecProtectingPackets().
+  void set_max_packets_per_fec_group(size_t max_packets_per_fec_group);
 
  private:
   friend class test::QuicPacketCreatorPeer;