fix mixed mode asset requests.

Because right now it looks like this:

![image](https://cloud.githubusercontent.com/assets/39191/4924546/18bb0d28-6524-11e4-84c3-1c134bcc89ba.png)

and these are the blocked requests:

![image](https://cloud.githubusercontent.com/assets/39191/4924553/2a1f0380-6524-11e4-9705-fc08f3aa3442.png)