Chrome is letting you know that while the page was served over an encrypted channel, code on the page (i.e. either Facebook or Zynga's code) is attempting to load additional child assets over an unencrypted channel.
Chrome is letting you know that while the page was served over an encrypted channel, code on the page (i.e. either Facebook or Zynga's code) is attempting to load additional child assets over an unencrypted channel.