bug 1457894: Re-enable CSRF Protection. (#629). r=nthomas
bug 1457894: Re-enable CSRF Protection. (#629). r=nthomas


mozbhearsum/balrog,testbhearsum/balrog,mozbhearsum/balrog,testbhearsum/balrog,mozbhearsum/balrog,testbhearsum/balrog,testbhearsum/balrog,mozbhearsum/balrog