The header that Google Chrome is sending
HTTPS: 1 gets translated into
$_SERVER['HTTP_HTTPS'] on the server side. If you are facing this issue and want a temporary fix, add the following to your wp-config.php file:
// Chrome 44 HTTPS:1 header issue temporary fix
$_SERVER['HTTP_HTTPS'] = 0;
as of chrome version 44.0.2403.107 the HTTPS header has been removed and replaced by an
Upgrade-Insecure-Requests: 1 header.