Merge pull request #15727 from gtorodelvalle/contacts-bug-962989-message-to-Facebook-contact

Bug 962989 - [messages] sending message to a Facebook contact doesn't work (r=jmcanterafonseca)
(cherry picked from commit f856ac26063e5462efad3cf13a46b35c6686af5b)

Conflicts:
	build/jshint/xfail.list