Backed out changeset 9a867e5a4ef5 (bug 895417) for suspicion of causing OSX asserts.
Bug 895417 - Fix refpoint coordinates sent to child processes, r=kats
Backed out changesets 4f35e943f939 and da5fa63e90cb (bug 896250) for causing frequent OSX debug asserts on a CLOSED TREE.
Merge m-c to inbound.
Bug 897723 - Allow faulty.lib's on-demand decompression to be reentrant. r=nfroyd