Remove the last of the TLS fallback code.

net/ssl/ssl_config.cc

 // Copyright 2014 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.
 
 #include "net/ssl/ssl_config.h"
 
 #include "net/cert/cert_verifier.h"
 
 namespace net {
 
 const uint16_t kDefaultSSLVersionMin = SSL_PROTOCOL_VERSION_TLS1;
 
 const uint16_t kDefaultSSLVersionMax = SSL_PROTOCOL_VERSION_TLS1_2;
 
-const uint16_t kDefaultSSLVersionFallbackMin = SSL_PROTOCOL_VERSION_TLS1_2;
-
 SSLConfig::CertAndStatus::CertAndStatus() = default;
 SSLConfig::CertAndStatus::CertAndStatus(scoped_refptr<X509Certificate> cert_arg,
                                         CertStatus status)
     : cert(std::move(cert_arg)), cert_status(status) {}
 SSLConfig::CertAndStatus::CertAndStatus(const CertAndStatus& other)
     : cert(other.cert), cert_status(other.cert_status) {}
 SSLConfig::CertAndStatus::~CertAndStatus() = default;
 
 SSLConfig::SSLConfig()
     : rev_checking_enabled(false),
       rev_checking_required_local_anchors(false),
       sha1_local_anchors_enabled(false),
       version_min(kDefaultSSLVersionMin),
       version_max(kDefaultSSLVersionMax),
-      version_fallback_min(kDefaultSSLVersionFallbackMin),
       deprecated_cipher_suites_enabled(false),
       dhe_enabled(false),
       channel_id_enabled(true),
       false_start_enabled(true),
       signed_cert_timestamps_enabled(true),
       require_ecdhe(false),
       send_client_cert(false),
       verify_ev_cert(false),
-      version_fallback(false),
       cert_io_enabled(true),
       renego_allowed_default(false) {}
 
 SSLConfig::SSLConfig(const SSLConfig& other) = default;
 
 SSLConfig::~SSLConfig() {}
 
 bool SSLConfig::IsAllowedBadCert(X509Certificate* cert,
                                  CertStatus* cert_status) const {
   for (const auto& allowed_bad_cert : allowed_bad_certs) {
@@ skipping 15 matching lines @@
   if (cert_io_enabled)
     flags |= CertVerifier::VERIFY_CERT_IO_ENABLED;
   if (rev_checking_required_local_anchors)
     flags |= CertVerifier::VERIFY_REV_CHECKING_REQUIRED_LOCAL_ANCHORS;
   if (sha1_local_anchors_enabled)
     flags |= CertVerifier::VERIFY_ENABLE_SHA1_LOCAL_ANCHORS;
   return flags;
 }
 
 }  // namespace net