Backed out changeset ce34c13388f2 (bug 1007383) for crashtest failures.
Backed out 4 changesets (bug 1008236, bug 1010344, bug 1004458, bug 1008719) for mochitest crashes on a CLOSED TREE.

Backed out changeset 28ecab881472 (bug 1008719)
Backed out changeset 7eebcecb7e26 (bug 1004458)
Backed out changeset 17ea7f2276ac (bug 1010344)
Backed out changeset 184ead7f6e37 (bug 1008236)