Backed out 5 changesets (bug 1098126) for Windows web-platform-test failures.

Backed out changeset 7cf7a6ea28c2 (bug 1098126)
Backed out changeset 21aab02fb41c (bug 1098126)
Backed out changeset 55dba2167b36 (bug 1098126)
Backed out changeset 73c2707c4f60 (bug 1098126)
Backed out changeset 4d6a52c5fb75 (bug 1098126)