Backed out changeset 658e616bd231 (bug 957084) for marionette-webapi orange.
Backed out 6 changesets (bug 811635) for B2G debug mochitest orange.

Backed out changeset 2da820ed2587 (bug 811635)
Backed out changeset 3f7ee595646d (bug 811635)
Backed out changeset 96772cc4e346 (bug 811635)
Backed out changeset 61694318819a (bug 811635)
Backed out changeset 687a84bf0785 (bug 811635)
Backed out changeset 89b90ccdf603 (bug 811635)