Fix build.

AlekSi · achew22 · commit 185dda2d4713 · 2017-09-13T22:15:54.000-06:00
See grpc/grpc-go#1392.
diff --git a/examples/server/a_bit_of_everything.go b/examples/server/a_bit_of_everything.go
@@ -134,7 +134,7 @@ func (s *_ABitOfEverythingServer) List(_ *empty.Empty, stream examples.StreamSer
 	}
 
 	// return error when metadata includes error header
-	if header, ok := metadata.FromContext(stream.Context()); ok {
+	if header, ok := metadata.FromIncomingContext(stream.Context()); ok {
 		if v, ok := header["error"]; ok {
 			stream.SetTrailer(metadata.New(map[string]string{
 				"foo": "foo2",

Original file line number	Diff line number	Diff line change
`@@ -134,7 +134,7 @@ func (s _ABitOfEverythingServer) List(_ empty.Empty, stream examples.StreamSer`
`134`	`134`	`}`
`135`	`135`
`136`	`136`	`// return error when metadata includes error header`
`137`		`- if header, ok := metadata.FromContext(stream.Context()); ok {`
	`137`	`+ if header, ok := metadata.FromIncomingContext(stream.Context()); ok {`
`138`	`138`	`if v, ok := header["error"]; ok {`
`139`	`139`	`stream.SetTrailer(metadata.New(map[string]string{`
`140`	`140`	`"foo": "foo2",`