Backed out changeset abdb3afb7208 (bug 1014815) for B2G reftest failures.
Backed out 3 changesets (bug 1021114, bug 988486) for GC crashes on a CLOSED TREE.

Backed out changeset f56234ba7ec7 (bug 1021114)
Backed out changeset 14a4a9062253 (bug 988486)
Backed out changeset 03eccac81e15 (bug 988486)