Flip FLAGS_quic_reloadable_flag_quic_remove_multipath_bit to true.

net/quic/core/quic_flags_list.h

Index: net/quic/core/quic_flags_list.h
diff --git a/net/quic/core/quic_flags_list.h b/net/quic/core/quic_flags_list.h
index 7b020cd386fc5dc56fd7b828a9730a72f466449f..829f459c81645487e4ad1ec20aaa36c2e0757b29 100644
--- a/net/quic/core/quic_flags_list.h
+++ b/net/quic/core/quic_flags_list.h
@@ -143,7 +143,7 @@ QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_no_stop_waiting_frames, false)
 QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_allow_one_address_change, false)
 
 // If true, multipath bit is not used in public flag.
-QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_remove_multipath_bit, false)
+QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_remove_multipath_bit, true)
 
 // Allow QUIC's flow control autotuning to increase the window as
 // quickly for the first adjustment as in subsequent ones.
@@ -225,4 +225,4 @@ QUIC_FLAG(bool,
           false)
 
 // Fix the algorithm used by packet conservation.
-QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_bbr_fix_conservation, false)
+QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_bbr_fix_conservation, false)