Backed out 4 changesets (bug 747428, bug 907324, bug 899353, bug 747552) for mochitest-other assertions.

Backed out changeset ee2bf84036fb (bug 907324)
Backed out changeset 17f932a5856d (bug 899353)
Backed out changeset b277e7b08f88 (bug 747552)
Backed out changeset 6ae3b1195542 (bug 747428)