Backed out 4 changesets (bug 869195, bug 870845, bug 872043, bug 862825) for mochitest b-c, mochitest-other, and xpcshell orange on a CLOSED TREE.

Backed out changeset 049889b25a79 (bug 869195)
Backed out changeset fc0bef5a2cfd (bug 862825)
Backed out changeset 267fe0d9c201 (bug 870845)
Backed out changeset 7b06b9d1acb2 (bug 872043)