Fix the T-Rex easter egg on 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..a1a3cd3c8b28c59eedf34003ab5eae56e957f31d 100644
--- a/components/neterror/resources/offline.js
+++ b/components/neterror/resources/offline.js
@@ -292,7 +292,16 @@ Runner.prototype = {
       this.spriteDef = Runner.spriteDefinition.LDPI;
     }
 
-    this.init();
+    if(!Runner.imageSprite.complete) {

[Eugene But (OOO till 7-30), 2016/07/13 05:28:57]

Space after |if|

[kkhorimoto, 2016/07/13 17:54:53]

Done.

+      // If the images are not yet loaded, add a listener.
+      Runner.imageSprite.runner = this;
+
+      Runner.imageSprite.onload = function() {
+        this.runner.init();
+      }
+    } else {
+      this.init();
+    }
   },
 
   /**
@@ -660,7 +669,9 @@ Runner.prototype = {
         if (!this.activated) {
           this.loadSounds();
           this.activated = true;
-          errorPageController.trackEasterEgg();
+          if (window.errorPageController) {

[Eugene But (OOO till 7-30), 2016/07/13 05:28:57]

Optional NIT: Maybe s/window.errorPageController/errorPageController for
consistency with the next line.

[kkhorimoto, 2016/07/13 17:54:53]

Done.

+            errorPageController.trackEasterEgg();
+          }
         }
 
         if (!this.tRex.jumping && !this.tRex.ducking) {