Call to fonts.googleapis.com causes insecure content

I noticed in the style.css file there's the following lines:

/* Import the Open Sans webfont from Google CDN */
@import url(http://fonts.googleapis.com/css?family=Open+Sans:400,300&subset=latin,greek,cyrillic,vietnamese);

On an SSL site, this is being called and causing an SSL error, i.e. this page has insecure content. Now, the page displays for for modern browsers, but IE won't work right with this error unless using compatibility mode, and it still gives an insecure content message.

How about removing this @import from css and use the following in the template.php file:

function adminimal_preprocess_html(&$variables) {
  drupal_add_css('//fonts.googleapis.com/css?family=Open+Sans:400,300&subset=latin,greek,cyrillic,vietnamese',array('type' => 'external'));
}

Similar issue with Adminimal Administration Menu --> https://drupal.org/node/2030773