deprecate FLAGS_quic_disable_pre_34

net/quic/core/quic_protocol.h

Index: net/quic/core/quic_protocol.h
diff --git a/net/quic/core/quic_protocol.h b/net/quic/core/quic_protocol.h
index 068ef9a387b034a6ac134dd2686979ce185f1633..69bc7f166cf958e3eaac5f332e133e45ba3ac98f 100644
--- a/net/quic/core/quic_protocol.h
+++ b/net/quic/core/quic_protocol.h
@@ -112,8 +112,6 @@ struct NET_EXPORT_PRIVATE QuicPacketHeader {
   QuicPacketPublicHeader public_header;
   QuicPacketNumber packet_number;
   QuicPathId path_id;
-  bool entropy_flag;
-  QuicPacketEntropyHash entropy_hash;
 };
 
 struct NET_EXPORT_PRIVATE QuicPublicResetPacket {
@@ -224,9 +222,6 @@ struct NET_EXPORT_PRIVATE QuicStopWaitingFrame {
       const QuicStopWaitingFrame& s);
   // Path which this stop waiting frame belongs to.
   QuicPathId path_id;
-  // Entropy hash of all packets up to, but not including, the least unacked
-  // packet.
-  QuicPacketEntropyHash entropy_hash;
   // The lowest packet we've sent which is unacked, and we expect an ack for.
   QuicPacketNumber least_unacked;
 };
@@ -321,13 +316,6 @@ struct NET_EXPORT_PRIVATE QuicAckFrame {
                                                      const QuicAckFrame& s);
 
   // The highest packet number we've observed from the peer.
-  //
-  // In general, this should be the largest packet number we've received.  In
-  // the case of truncated acks, we may have to advertise a lower "upper bound"
-  // than largest received, to avoid implicitly acking missing packets that
-  // don't fit in the missing packet list due to size limitations.  In this
-  // case, largest_observed may be a packet which is also in the missing packets
-  // list.
   QuicPacketNumber largest_observed;
 
   // Time elapsed since largest_observed was received until this Ack frame was
@@ -342,17 +330,6 @@ struct NET_EXPORT_PRIVATE QuicAckFrame {
 
   // Path which this ack belongs to.
   QuicPathId path_id;
-
-  // Entropy hash of all packets up to largest observed not including missing
-  // packets.
-  QuicPacketEntropyHash entropy_hash;
-
-  // Whether the ack had to be truncated when sent.
-  bool is_truncated;
-
-  // If true, |packets| express missing packets. Otherwise, |packets| express
-  // received packets.
-  bool missing;
 };
 
 // True if the packet number is greater than largest_observed or is listed
@@ -661,8 +638,6 @@ class NET_EXPORT_PRIVATE QuicVersionManager {
   const QuicVersionVector& GetSupportedVersions();
 
  private:
-  // FLAGS_quic_disable_pre_34
-  bool disable_pre_34_;
   // FLAGS_quic_enable_version_35
   bool enable_version_35_;
   // FLAGS_quic_enable_version_36_v2
@@ -690,7 +665,6 @@ struct NET_EXPORT_PRIVATE SerializedPacket {
                    QuicPacketNumberLength packet_number_length,
                    const char* encrypted_buffer,
                    QuicPacketLength encrypted_length,
-                   QuicPacketEntropyHash entropy_hash,
                    bool has_ack,
                    bool has_stop_waiting);
   SerializedPacket(const SerializedPacket& other);
@@ -709,7 +683,6 @@ struct NET_EXPORT_PRIVATE SerializedPacket {
   QuicPacketNumber packet_number;
   QuicPacketNumberLength packet_number_length;
   EncryptionLevel encryption_level;
-  QuicPacketEntropyHash entropy_hash;
   bool has_ack;
   bool has_stop_waiting;
   TransmissionType transmission_type;