Backed out 4 changesets (bug 902714, bug 900221) for mochitest orange. DONTBUILD

Backed out changeset 171a90f58f74 (bug 900221)
Backed out changeset 6155a371223a (bug 900221)
Backed out changeset 494d88a27129 (bug 902714)
Backed out changeset 4c3f59e9c7a0 (bug 902714)