diff --git a/vendor/google.golang.org/grpc/balancer/base/balancer.go b/vendor/google.golang.org/grpc/balancer/base/balancer.go
index 245785e..e587d8d 100644
--- a/vendor/google.golang.org/grpc/balancer/base/balancer.go
+++ b/vendor/google.golang.org/grpc/balancer/base/balancer.go
@@ -67,14 +67,16 @@
 }
 
 func (b *baseBalancer) HandleResolvedAddrs(addrs []resolver.Address, err error) {
-	if err != nil {
-		grpclog.Infof("base.baseBalancer: HandleResolvedAddrs called with error %v", err)
-		return
-	}
-	grpclog.Infoln("base.baseBalancer: got new resolved addresses: ", addrs)
+	panic("not implemented")
+}
+
+func (b *baseBalancer) UpdateClientConnState(s balancer.ClientConnState) {
+	// TODO: handle s.ResolverState.Err (log if not nil) once implemented.
+	// TODO: handle s.ResolverState.ServiceConfig?
+	grpclog.Infoln("base.baseBalancer: got new ClientConn state: ", s)
 	// addrsSet is the set converted from addrs, it's used for quick lookup of an address.
 	addrsSet := make(map[resolver.Address]struct{})
-	for _, a := range addrs {
+	for _, a := range s.ResolverState.Addresses {
 		addrsSet[a] = struct{}{}
 		if _, ok := b.subConns[a]; !ok {
 			// a is a new address (not existing in b.subConns).
@@ -120,6 +122,11 @@
 }
 
 func (b *baseBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
+	panic("not implemented")
+}
+
+func (b *baseBalancer) UpdateSubConnState(sc balancer.SubConn, state balancer.SubConnState) {
+	s := state.ConnectivityState
 	grpclog.Infof("base.baseBalancer: handle SubConn state change: %p, %v", sc, s)
 	oldS, ok := b.scStates[sc]
 	if !ok {