Backed out 8 changesets (bug 1598516) for build bustage at ParentChannelListener.cpp on a CLOSED TREE.

Backed out changeset 7ac1b091aa5f (bug 1598516)
Backed out changeset b62c5b49b91c (bug 1598516)
Backed out changeset e48c0ce38498 (bug 1598516)
Backed out changeset cc2599921b5e (bug 1598516)
Backed out changeset 0a0f80b0b278 (bug 1598516)
Backed out changeset 1dc19a039cab (bug 1598516)
Backed out changeset b664c8af6e2d (bug 1598516)
Backed out changeset 943b440179b9 (bug 1598516)