gRPC migration

Change-Id: I3129ae27d7ee12a23c7046f0d877e8064f2fd7f4
diff --git a/vendor/google.golang.org/protobuf/internal/encoding/text/encode.go b/vendor/google.golang.org/protobuf/internal/encoding/text/encode.go
index c4ba1c5..da289cc 100644
--- a/vendor/google.golang.org/protobuf/internal/encoding/text/encode.go
+++ b/vendor/google.golang.org/protobuf/internal/encoding/text/encode.go
@@ -32,7 +32,6 @@
 	encoderState
 
 	indent      string
-	newline     string // set to "\n" if len(indent) > 0
 	delims      [2]byte
 	outputASCII bool
 }
@@ -61,7 +60,6 @@
 			return nil, errors.New("indent may only be composed of space and tab characters")
 		}
 		e.indent = indent
-		e.newline = "\n"
 	}
 	switch delims {
 	case [2]byte{0, 0}:
@@ -126,7 +124,7 @@
 			// are used to represent both the proto string and bytes type.
 			r = rune(in[0])
 			fallthrough
-		case r < ' ' || r == '"' || r == '\\':
+		case r < ' ' || r == '"' || r == '\\' || r == 0x7f:
 			out = append(out, '\\')
 			switch r {
 			case '"', '\\':
@@ -143,7 +141,7 @@
 				out = strconv.AppendUint(out, uint64(r), 16)
 			}
 			in = in[n:]
-		case outputASCII && r >= utf8.RuneSelf:
+		case r >= utf8.RuneSelf && (outputASCII || r <= 0x009f):
 			out = append(out, '\\')
 			if r <= math.MaxUint16 {
 				out = append(out, 'u')
@@ -168,7 +166,7 @@
 // escaping. If no characters need escaping, this returns the input length.
 func indexNeedEscapeInString(s string) int {
 	for i := 0; i < len(s); i++ {
-		if c := s[i]; c < ' ' || c == '"' || c == '\'' || c == '\\' || c >= utf8.RuneSelf {
+		if c := s[i]; c < ' ' || c == '"' || c == '\'' || c == '\\' || c >= 0x7f {
 			return i
 		}
 	}
@@ -265,3 +263,8 @@
 func (e *Encoder) Reset(es encoderState) {
 	e.encoderState = es
 }
+
+// AppendString appends the escaped form of the input string to b.
+func AppendString(b []byte, s string) []byte {
+	return appendString(b, s, false)
+}