Backed out 33 changesets (bug 896126, bug 887334, bug 889911, bug 889714, bug 895774) for breaking xpcshell tests on a CLOSED TREE.

Backed out changeset 84b828b63115 (bug 896126)
Backed out changeset 90dd4a81f0e5 (bug 887334)
Backed out changeset ce42d46f8703 (bug 887334)
Backed out changeset 0162540d3ba3 (bug 887334)
Backed out changeset 94717e9e5e8a (bug 887334)
Backed out changeset 45c8301b2800 (bug 887334)
Backed out changeset 409df5742b7a (bug 887334)
Backed out changeset aa0205a0b60a (bug 887334)
Backed out changeset a48028124452 (bug 887334)
Backed out changeset 762a8d221460 (bug 887334)
Backed out changeset 2c36942312c8 (bug 887334)
Backed out changeset 1e48252b5a1d (bug 887334)
Backed out changeset 30b19452ea7a (bug 887334)
Backed out changeset e0f3ed4738d3 (bug 887334)
Backed out changeset 2aa3a1f91a7d (bug 887334)
Backed out changeset e9d11a421246 (bug 887334)
Backed out changeset c7e4cd12068a (bug 887334)
Backed out changeset 89e3b08492de (bug 887334)
Backed out changeset a3f028f1f05e (bug 887334)
Backed out changeset eaf22159cd3e (bug 889714)
Backed out changeset 142c7afd4ec5 (bug 889714)
Backed out changeset 0645c69167ba (bug 889714)
Backed out changeset 6462b9338a49 (bug 889714)
Backed out changeset c9387ac33f08 (bug 889714)
Backed out changeset efe2d89832cf (bug 889714)
Backed out changeset a83ae579e3df (bug 889714)
Backed out changeset 8d6c8265c2e6 (bug 889714)
Backed out changeset 95cdfa09a620 (bug 889714)
Backed out changeset 9b908f05db0b (bug 889911)
Backed out changeset c7b60796eee3 (bug 889911)
Backed out changeset 037f34ec7b8b (bug 889911)
Backed out changeset 33ef1b0a043f (bug 889911)
Backed out changeset 05efd6fc03e3 (bug 895774)