Add a QuicConfig option to ask the client not to attempt migration.

net/quic/quic_config.h

 // Copyright (c) 2013 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_CONFIG_H_
 #define NET_QUIC_QUIC_CONFIG_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 317 matching lines @@
   void SetSocketReceiveBufferToSend(uint32_t window_bytes);
 
   bool HasReceivedSocketReceiveBuffer() const;
 
   uint32_t ReceivedSocketReceiveBuffer() const;
 
   void SetMultipathEnabled(bool multipath_enabled);
 
   bool MultipathEnabled() const;
 
+  void SetDisableConnectionMigration();
+
+  bool DisableConnectionMigration() const;
+
   bool negotiated() const;
 
   // ToHandshakeMessage serialises the settings in this object as a series of
   // tags /value pairs and adds them to |out|.
   void ToHandshakeMessage(CryptoHandshakeMessage* out) const;
 
   // Calls ProcessPeerHello on each negotiable parameter. On failure returns
   // the corresponding QuicErrorCode and sets detailed error in |error_details|.
   QuicErrorCode ProcessPeerHello(const CryptoHandshakeMessage& peer_hello,
                                  HelloType hello_type,
@@ skipping 29 matching lines @@
   // Initial stream flow control receive window in bytes.
   QuicFixedUint32 initial_stream_flow_control_window_bytes_;
   // Initial session flow control receive window in bytes.
   QuicFixedUint32 initial_session_flow_control_window_bytes_;
 
   // Socket receive buffer in bytes.
   QuicFixedUint32 socket_receive_buffer_;
 
   // Whether to support multipath for this connection.
   QuicNegotiableUint32 multipath_enabled_;
+
+  // Whether tell peer not to attempt connection migration.
+  QuicFixedUint32 connection_migration_disabled_;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONFIG_H_