Backed out 6 changesets (bug 939294) for B2G bustage on a CLOSED TREE.

Backed out changeset 8c3aa9973da0 (bug 939294)
Backed out changeset 37098c13e59e (bug 939294)
Backed out changeset 7c9ade6c871c (bug 939294)
Backed out changeset fed59539afc1 (bug 939294)
Backed out changeset 89e9d3fa16fc (bug 939294)
Backed out changeset c97e58ebc5f4 (bug 939294)