gRPC migration

Change-Id: I3129ae27d7ee12a23c7046f0d877e8064f2fd7f4
diff --git a/vendor/google.golang.org/protobuf/internal/encoding/tag/tag.go b/vendor/google.golang.org/protobuf/internal/encoding/tag/tag.go
index 16c02d7..38f1931 100644
--- a/vendor/google.golang.org/protobuf/internal/encoding/tag/tag.go
+++ b/vendor/google.golang.org/protobuf/internal/encoding/tag/tag.go
@@ -104,7 +104,7 @@
 		case strings.HasPrefix(s, "json="):
 			jsonName := s[len("json="):]
 			if jsonName != strs.JSONCamelCase(string(f.L0.FullName.Name())) {
-				f.L1.JSONName.Init(jsonName)
+				f.L1.StringName.InitJSON(jsonName)
 			}
 		case s == "packed":
 			f.L1.HasPacked = true