vendor update for E2E framework

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/google.golang.org/grpc/balancer_conn_wrappers.go

@@ -82,20 +82,13 @@ func (b *scStateUpdateBuffer) get() <-chan *scStateUpdate {
 	return b.c
 }
 
-// resolverUpdate contains the new resolved addresses or error if there's
-// any.
-type resolverUpdate struct {
-	addrs []resolver.Address
-	err   error
-}
-
 // ccBalancerWrapper is a wrapper on top of cc for balancers.
 // It implements balancer.ClientConn interface.
 type ccBalancerWrapper struct {
 	cc               *ClientConn
 	balancer         balancer.Balancer
 	stateChangeQueue *scStateUpdateBuffer
-	resolverUpdateCh chan *resolverUpdate
+	resolverUpdateCh chan *resolver.State
 	done             chan struct{}
 
 	mu       sync.Mutex
@@ -106,7 +99,7 @@ func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.Bui
 	ccb := &ccBalancerWrapper{
 		cc:               cc,
 		stateChangeQueue: newSCStateUpdateBuffer(),
-		resolverUpdateCh: make(chan *resolverUpdate, 1),
+		resolverUpdateCh: make(chan *resolver.State, 1),
 		done:             make(chan struct{}),
 		subConns:         make(map[*acBalancerWrapper]struct{}),
 	}
@@ -128,15 +121,23 @@ func (ccb *ccBalancerWrapper) watcher() {
 				return
 			default:
 			}
-			ccb.balancer.HandleSubConnStateChange(t.sc, t.state)
-		case t := <-ccb.resolverUpdateCh:
+			if ub, ok := ccb.balancer.(balancer.V2Balancer); ok {
+				ub.UpdateSubConnState(t.sc, balancer.SubConnState{ConnectivityState: t.state})
+			} else {
+				ccb.balancer.HandleSubConnStateChange(t.sc, t.state)
+			}
+		case s := <-ccb.resolverUpdateCh:
 			select {
 			case <-ccb.done:
 				ccb.balancer.Close()
 				return
 			default:
 			}
-			ccb.balancer.HandleResolvedAddrs(t.addrs, t.err)
+			if ub, ok := ccb.balancer.(balancer.V2Balancer); ok {
+				ub.UpdateResolverState(*s)
+			} else {
+				ccb.balancer.HandleResolvedAddrs(s.Addresses, nil)
+			}
 		case <-ccb.done:
 		}
 
@@ -177,37 +178,23 @@ func (ccb *ccBalancerWrapper) handleSubConnStateChange(sc balancer.SubConn, s co
 	})
 }
 
-func (ccb *ccBalancerWrapper) handleResolvedAddrs(addrs []resolver.Address, err error) {
+func (ccb *ccBalancerWrapper) updateResolverState(s resolver.State) {
 	if ccb.cc.curBalancerName != grpclbName {
-		var containsGRPCLB bool
-		for _, a := range addrs {
-			if a.Type == resolver.GRPCLB {
-				containsGRPCLB = true
-				break
+		// Filter any grpclb addresses since we don't have the grpclb balancer.
+		for i := 0; i < len(s.Addresses); {
+			if s.Addresses[i].Type == resolver.GRPCLB {
+				copy(s.Addresses[i:], s.Addresses[i+1:])
+				s.Addresses = s.Addresses[:len(s.Addresses)-1]
+				continue
 			}
-		}
-		if containsGRPCLB {
-			// The current balancer is not grpclb, but addresses contain grpclb
-			// address. This means we failed to switch to grpclb, most likely
-			// because grpclb is not registered. Filter out all grpclb addresses
-			// from addrs before sending to balancer.
-			tempAddrs := make([]resolver.Address, 0, len(addrs))
-			for _, a := range addrs {
-				if a.Type != resolver.GRPCLB {
-					tempAddrs = append(tempAddrs, a)
-				}
-			}
-			addrs = tempAddrs
+			i++
 		}
 	}
 	select {
 	case <-ccb.resolverUpdateCh:
 	default:
 	}
-	ccb.resolverUpdateCh <- &resolverUpdate{
-		addrs: addrs,
-		err:   err,
-	}
+	ccb.resolverUpdateCh <- &s
 }
 
 func (ccb *ccBalancerWrapper) NewSubConn(addrs []resolver.Address, opts balancer.NewSubConnOptions) (balancer.SubConn, error) {