[iOS] Fix offline dino on iPad

When loading the offline dino after a navigation, the UserAgent is reset
to the CriOS user agent. This CL makes sure that we also consider that
we are on iOS when CriOS is present in the UserAgent.

Bug: 1008774
Change-Id: I67238b0f137e626476e635593651b8d716472cd5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1893959Reviewed-by: Hector Carmona <hcarmona@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Auto-Submit: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#711906}

components/neterror/resources/offline.js

@@ -103,9 +103,9 @@ var IS_HIDPI = window.devicePixelRatio > 1;
 // but navigator.userAgent includes /Safari/.
 // TODO(crbug.com/998999): Fix navigator.userAgent such that it reliably
 // returns an agent string containing "CriOS".
-var IS_IOS = /iPad|iPhone|iPod|MacIntel/.test(window.navigator.platform) &&
-    !(/Safari/.test(window.navigator.userAgent));
-
+var IS_IOS = /CriOS/.test(window.navigator.userAgent) ||
+    /iPad|iPhone|iPod|MacIntel/.test(window.navigator.platform) &&
+        !(/Safari/.test(window.navigator.userAgent));
 
 /** @const */
 var IS_MOBILE = /Android/.test(window.navigator.userAgent) || IS_IOS;