Backed out 7 changesets (bug 949668) for Windows jit-test failures on a CLOSED TREE.

Backed out changeset 3786ca248031 (bug 949668)
Backed out changeset 05c4fa8d327b (bug 949668)
Backed out changeset ca7eeb4f5570 (bug 949668)
Backed out changeset ff3bdc0fb8e3 (bug 949668)
Backed out changeset 2ff5f77b2047 (bug 949668)
Backed out changeset 246083962f43 (bug 949668)
Backed out changeset 8af12200ad0b (bug 949668)