Backed out changeset 57a7a785a964 (bug 906990)
Backed out changeset 00f838879263 (bug 906990)
Backed out changeset 875f6e0be7b1 (bug 906990)
Backed out changeset 325d718fec53 (bug 906990)
Backed out changeset ff8128d5a5d9 (bug 906990) for b2g build bustage on a CLOSED TREE