Bug 974867 - [MMS]Auto suggestion for email address r=Julien

https://bugzilla.mozilla.org/show_bug.cgi?id=974867
I know you copied the bad style of what was done above, please do it like this:

```javascript
Contacts.findContactByString('O\'Hare', function(contacts) {
  done(function() {
    var mHistory...
    assert...
  });
});
```