On client address changes, only migrate QUIC connections when client address changes are considered…

net/quic/quic_connection.h

Index: net/quic/quic_connection.h
diff --git a/net/quic/quic_connection.h b/net/quic/quic_connection.h
index 288de9ad9e5f90d0a00efb2e3b2b52dff46351f0..87e72f91c5ab4d4c61a654c99e985384c4d54202 100644
--- a/net/quic/quic_connection.h
+++ b/net/quic/quic_connection.h
@@ -656,6 +656,9 @@ class NET_EXPORT_PRIVATE QuicConnection
 
   QuicConnectionHelperInterface* helper() { return helper_; }
 
+  // On peer address changes, determine and return the change type.
+  virtual PeerAddressChangeType DeterminePeerAddressChangeType();
+
   // Selects and updates the version of the protocol being used by selecting a
   // version from |available_versions| which is also supported. Returns true if
   // such a version exists, false otherwise.
@@ -665,6 +668,8 @@ class NET_EXPORT_PRIVATE QuicConnection
 
   bool peer_port_changed() const { return peer_port_changed_; }
 
+  const IPAddressNumber& migrating_peer_ip() const { return migrating_peer_ip_; }
+
  private:
   friend class test::QuicConnectionPeer;
   friend class test::PacketSavingConnection;