Disable QUIC versions less than v32, protected by --FLAGS_quic_disable_pre_32.

net/quic/core/quic_protocol.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_QUIC_PROTOCOL_H_
 #define NET_QUIC_QUIC_PROTOCOL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 1403 matching lines @@
 // Used to generate filtered supported versions based on flags.
 class NET_EXPORT_PRIVATE QuicVersionManager {
  public:
   explicit QuicVersionManager(QuicVersionVector supported_versions);
   ~QuicVersionManager();
 
   // Returns supported versions based on flags.
   const QuicVersionVector& GetSupportedVersions();
 
  private:
+  // FLAGS_quic_disable_pre_32
+  bool disable_pre_32_;
   // FLAGS_quic_enable_version_35
-  bool enable_quic_version_35_;
+  bool enable_version_35_;
   // FLAGS_quic_enable_version_36_v2
-  bool enable_quic_version_36_;
+  bool enable_version_36_;
   // The list of versions that may be supported.
   QuicVersionVector allowed_supported_versions_;
   // This vector contains QUIC versions which are currently supported based
   // on flags.
   QuicVersionVector filtered_supported_versions_;
 };
 
 struct NET_EXPORT_PRIVATE AckListenerWrapper {
   AckListenerWrapper(QuicAckListenerInterface* listener,
                      QuicPacketLength data_length);
@@ skipping 118 matching lines @@
       : iov(iov), iov_count(iov_count), total_length(total_length) {}
 
   const struct iovec* iov;
   const int iov_count;
   const size_t total_length;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PROTOCOL_H_