update examples to use addService

Author: mitchdraft

net/grpc/gateway/examples/echo/node-server/server.js

@@ -95,7 +95,7 @@ function doServerStreamingEcho(call) {
  */
 function getServer() {
   var server = new grpc.Server();
-  server.addProtoService(echo.EchoService.service, {
+  server.addService(echo.EchoService.service, {
     echo: doEcho,
     echoAbort: doEchoAbort,
     serverStreamingEcho: doServerStreamingEcho,

net/grpc/gateway/examples/helloworld/README.md

@@ -66,7 +66,7 @@ function doSayHello(call, callback) {
 
 function getServer() {
   var server = new grpc.Server();
-  server.addProtoService(helloworld.Greeter.service, {
+  server.addService(helloworld.Greeter.service, {
     sayHello: doSayHello,
   });
   return server;

net/grpc/gateway/examples/helloworld/server.js

@@ -84,7 +84,7 @@ function doSayHelloAfterDelay(call, callback) {
  */
 function getServer() {
   var server = new grpc.Server();
-  server.addProtoService(helloworld.Greeter.service, {
+  server.addService(helloworld.Greeter.service, {
     sayHello: doSayHello,
     sayRepeatHello: doSayRepeatHello,
     sayHelloAfterDelay: doSayHelloAfterDelay