Fix dinosaur offline game for iOS

components/neterror/resources/offline.js

Index: components/neterror/resources/offline.js
diff --git a/components/neterror/resources/offline.js b/components/neterror/resources/offline.js
index 005f4f3ae20dc570369df092d783a9e5bfec0e13..5fa3050629dc6da4bc2fbd02e01081f3dcef2edd 100644
--- a/components/neterror/resources/offline.js
+++ b/components/neterror/resources/offline.js
@@ -89,8 +89,7 @@ var FPS = 60;
 var IS_HIDPI = window.devicePixelRatio > 1;
 
 /** @const */
-var IS_IOS = window.navigator.userAgent.indexOf('CriOS') > -1 ||
-    window.navigator.userAgent == 'UIWebViewForStaticFileContent';
+var IS_IOS = window.navigator.platform.substr(0,2) === 'iP';
 
 /** @const */
 var IS_MOBILE = window.navigator.userAgent.indexOf('Mobi') > -1 || IS_IOS;
@@ -660,7 +659,9 @@ Runner.prototype = {
         if (!this.activated) {
           this.loadSounds();
           this.activated = true;
-          errorPageController.trackEasterEgg();
+          if (window.errorPageController) {
+            errorPageController.trackEasterEgg();
+          }
         }
 
         if (!this.tRex.jumping && !this.tRex.ducking) {
@@ -970,7 +971,7 @@ function decodeBase64ToArrayBuffer(base64String) {
  * @return {number}
  */
 function getTimeStamp() {
-  return IS_IOS ? new Date().getTime() : performance.now();
+  return performance.now();
 }