Navigator.onLine is not correctly initialized with the network status. It's initialized to true in the constructor by default.
Internal tracking Number: 270396
Created attachment 180722 [details] Patch
Comment on attachment 180722 [details] Patch Reviewed by George offline. Commit it.
Comment on attachment 180722 [details] Patch Clearing flags on attachment: 180722 Committed r138470: <http://trac.webkit.org/changeset/138470>
All reviewed patches have been landed. Closing bug.