Backed out 2 changesets (bug 884587)

Backed out changeset 447ff64adbb1 (bug 884587)
Backed out changeset 8d90527c22c6 (bug 884587)
Backed out 2 changesets (bug 886618, bug 886657) for frequent OSX 10.7 mochitest-1 failures.

Backed out changeset 9fd8b2adc693 (bug 886618)
Backed out changeset 376fe12f4de4 (bug 886657)