From 7c19ae302ef5d13f8589a6bf3a2b12af17589e14 Mon Sep 17 00:00:00 2001
From: Milan Burda <milan.burda@gmail.com>
Date: Mon, 21 May 2018 03:00:56 +0200
Subject: [PATCH] replace isEventEmitter with instanceof EventEmitter
 (rpc-server) (#12998)

---
 lib/browser/rpc-server.js | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/lib/browser/rpc-server.js b/lib/browser/rpc-server.js
index 271f5c9ac3ac..19e3e7edb7d1 100644
--- a/lib/browser/rpc-server.js
+++ b/lib/browser/rpc-server.js
@@ -147,17 +147,11 @@ const throwRPCError = function (message) {
   throw error
 }
 
-const isEventEmitter = (object) => {
-  if (!object) return false
-  const prototype = Object.getPrototypeOf(object)
-  return prototype === EventEmitter.prototype || isEventEmitter(prototype)
-}
-
 const removeRemoteListenersAndLogWarning = (sender, meta, callIntoRenderer) => {
   let message = `Attempting to call a function in a renderer window that has been closed or released.` +
     `\nFunction provided here: ${meta.location}`
 
-  if (isEventEmitter(sender)) {
+  if (sender instanceof EventEmitter) {
     const remoteEvents = sender.eventNames().filter((eventName) => {
       return sender.listeners(eventName).includes(callIntoRenderer)
     })