Due to a wrong check, defersLoading support in cURL while implement is disabled at compile time. This issue can be seen when browsing at http://mapquest.com. Patch to solve this bug attached.
Created attachment 45140 [details] Fix the version check
style-queue ran check-webkit-style on attachment 45140 [details] without any errors.
Comment on attachment 45140 [details] Fix the version check r=me
Landed in r52438.