Remove the last of the TLS fallback code.

net/ssl/ssl_connection_status_flags.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_SSL_SSL_CONNECTION_STATUS_FLAGS_H_
 #define NET_SSL_SSL_CONNECTION_STATUS_FLAGS_H_
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "base/macros.h"
 
 namespace net {
 
 // Status flags for SSLInfo::connection_status.
 enum {
   // The lower 16 bits are reserved for the TLS ciphersuite id.
   SSL_CONNECTION_CIPHERSUITE_MASK = 0xffff,
 
   // The next two bits are reserved for the compression used.
   SSL_CONNECTION_COMPRESSION_SHIFT = 16,
   SSL_CONNECTION_COMPRESSION_MASK = 3,
 
-  // We fell back to an older protocol version for this connection.
-  SSL_CONNECTION_VERSION_FALLBACK = 1 << 18,
+  // 1 << 18 was previously used for SSL_CONNECTION_VERSION_FALLBACK.
 
   // The server doesn't support the renegotiation_info extension. If this bit
   // is not set then either the extension isn't supported, or we don't have any
   // knowledge either way. (The latter case will occur when we use an SSL
   // library that doesn't report it, like SChannel.)
   SSL_CONNECTION_NO_RENEGOTIATION_EXTENSION = 1 << 19,
 
   // The next three bits are reserved for the SSL version.
   SSL_CONNECTION_VERSION_SHIFT = 20,
   SSL_CONNECTION_VERSION_MASK = 7,
@@ skipping 44 matching lines @@
   *connection_status &=
       ~(SSL_CONNECTION_VERSION_MASK << SSL_CONNECTION_VERSION_SHIFT);
   // Set the new version.
   *connection_status |=
       ((version & SSL_CONNECTION_VERSION_MASK) << SSL_CONNECTION_VERSION_SHIFT);
 }
 
 }  // namespace net
 
 #endif  // NET_SSL_SSL_CONNECTION_STATUS_FLAGS_H_