diff --git a/lib/renderer/override.js b/lib/renderer/override.js
index 3ed4d3666e52..69ef3a5e6f9a 100644
--- a/lib/renderer/override.js
+++ b/lib/renderer/override.js
@@ -22,7 +22,7 @@ var BrowserWindowProxy = (function () {
   }
 
   BrowserWindowProxy.remove = function (guestId) {
-    return delete this.proxies[guestId]
+    delete this.proxies[guestId]
   }
 
   function BrowserWindowProxy (guestId1) {
@@ -70,11 +70,11 @@ var BrowserWindowProxy = (function () {
     if (targetOrigin == null) {
       targetOrigin = '*'
     }
-    return ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_POSTMESSAGE', this.guestId, message, targetOrigin, window.location.origin)
+    ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_POSTMESSAGE', this.guestId, message, targetOrigin, window.location.origin)
   }
 
   BrowserWindowProxy.prototype['eval'] = function (...args) {
-    return ipcRenderer.send.apply(ipcRenderer, ['ELECTRON_GUEST_WINDOW_MANAGER_WEB_CONTENTS_METHOD', this.guestId, 'executeJavaScript'].concat(args))
+    ipcRenderer.send.apply(ipcRenderer, ['ELECTRON_GUEST_WINDOW_MANAGER_WEB_CONTENTS_METHOD', this.guestId, 'executeJavaScript'].concat(args))
   }
 
   return BrowserWindowProxy
@@ -207,7 +207,7 @@ ipcRenderer.on('ELECTRON_GUEST_WINDOW_POSTMESSAGE', function (event, sourceId, m
 
 // Forward history operations to browser.
 var sendHistoryOperation = function (...args) {
-  return ipcRenderer.send.apply(ipcRenderer, ['ELECTRON_NAVIGATION_CONTROLLER'].concat(args))
+  ipcRenderer.send.apply(ipcRenderer, ['ELECTRON_NAVIGATION_CONTROLLER'].concat(args))
 }
 
 var getHistoryOperation = function (...args) {
@@ -215,15 +215,15 @@ var getHistoryOperation = function (...args) {
 }
 
 window.history.back = function () {
-  return sendHistoryOperation('goBack')
+  sendHistoryOperation('goBack')
 }
 
 window.history.forward = function () {
-  return sendHistoryOperation('goForward')
+  sendHistoryOperation('goForward')
 }
 
 window.history.go = function (offset) {
-  return sendHistoryOperation('goToOffset', offset)
+  sendHistoryOperation('goToOffset', offset)
 }
 
 Object.defineProperty(window.history, 'length', {