gRPC migration

Change-Id: Ib390f6dde0d5a8d6db12ccd7da41135570ad1354
diff --git a/vendor/google.golang.org/grpc/service_config.go b/vendor/google.golang.org/grpc/service_config.go
index 5a80a57..4f8836d 100644
--- a/vendor/google.golang.org/grpc/service_config.go
+++ b/vendor/google.golang.org/grpc/service_config.go
@@ -136,9 +136,9 @@
 	maxAttempts int
 
 	// Exponential backoff parameters. The initial retry attempt will occur at
-	// random(0, initialBackoff). In general, the nth attempt will occur at
+	// random(0, initialBackoffMS). In general, the nth attempt will occur at
 	// random(0,
-	//   min(initialBackoff*backoffMultiplier**(n-1), maxBackoff)).
+	//   min(initialBackoffMS*backoffMultiplier**(n-1), maxBackoffMS)).
 	//
 	// These fields are required and must be greater than zero.
 	initialBackoff    time.Duration