Backed out 6 changesets (bug 960873) for Win64 build bustage

Backed out changeset 33d8989841ac (bug 960873)
Backed out changeset 6c9e404aeb3f (bug 960873)
Backed out changeset 36c8b10b0a31 (bug 960873)
Backed out changeset 29c36a7acfb0 (bug 960873)
Backed out changeset 6e3966e0eb40 (bug 960873)
Backed out changeset 612db692256b (bug 960873)