Backed out 5 changesets (bug 904720, bug 915757, bug 902909) for b2g bustage
CLOSED TREE

Backed out changeset 2980ed8667f3 (bug 902909)
Backed out changeset 8c6ea94c7a9e (bug 902909)
Backed out changeset 2cd9d6be6dc2 (bug 902909)
Backed out changeset c00c7a77c130 (bug 904720)
Backed out changeset e385645fb787 (bug 915757)