Backed out 4 changesets (bug 1020172) for causing bug 1089542 a=backout

Backed out changeset 176ca4363517 (bug 1020172)
Backed out changeset 90714be8e689 (bug 1020172)
Backed out changeset 9d8c09e711f5 (bug 1020172)
Backed out changeset f895938013ff (bug 1020172)