Get hidden state by using parent window directly

lib/browser/guest-view-manager.js

@@ -181,8 +181,7 @@ var attachGuest = function (embedder, elementInstanceId, guestInstanceId, params
     plugins: params.plugins,
     zoomFactor: params.zoomFactor,
     webSecurity: !params.disablewebsecurity,
-    blinkFeatures: params.blinkfeatures,
-    hiddenPage: params.hiddenPage
+    blinkFeatures: params.blinkfeatures
   }
 
   if (params.preload) {

lib/renderer/web-view/web-view.js

@@ -230,8 +230,7 @@ var WebViewImpl = (function () {
     params = {
       instanceId: this.viewInstanceId,
       userAgentOverride: this.userAgentOverride,
-      zoomFactor: webFrame.getZoomFactor(),
-      hiddenPage: document.hidden
+      zoomFactor: webFrame.getZoomFactor()
     }
     ref1 = this.attributes
     for (attributeName in ref1) {