Disable connection migration if disabled in config sent by server.

net/quic/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 648 matching lines @@
   // Connection migration errors.
   // Network changed, but connection had no migratable streams.
   QUIC_CONNECTION_MIGRATION_NO_MIGRATABLE_STREAMS = 81,
   // Connection changed networks too many times.
   QUIC_CONNECTION_MIGRATION_TOO_MANY_CHANGES = 82,
   // Connection migration was attempted, but there was no new network to
   // migrate to.
   QUIC_CONNECTION_MIGRATION_NO_NEW_NETWORK = 83,
   // Network changed, but connection had one or more non-migratable streams.
   QUIC_CONNECTION_MIGRATION_NON_MIGRATABLE_STREAM = 84,
+  // Connection migration was not attempted because it was disabled in the
+  // received config.
+  QUIC_CONNECTION_MIGRATION_DISABLED = 88,

[Ryan Hamilton, 2016/03/26 15:44:47]

I wonder if it wouldn't be simpler to use QUIC_IP_ADDRESS_CHANGED?

[Jana, 2016/03/28 17:03:20]

Makes sense. Done.

 
   // No error. Used as bound while iterating.
-  QUIC_LAST_ERROR = 88,
+  QUIC_LAST_ERROR = 89,
 };
 
 // Must be updated any time a QuicErrorCode is deprecated.
 const int kDeprecatedQuicErrorCount = 4;
 const int kActiveQuicErrorCount = QUIC_LAST_ERROR - kDeprecatedQuicErrorCount;
 
 struct NET_EXPORT_PRIVATE QuicPacketPublicHeader {
   QuicPacketPublicHeader();
   explicit QuicPacketPublicHeader(const QuicPacketPublicHeader& other);
   ~QuicPacketPublicHeader();
@@ skipping 741 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_