DONTBUILD (NPOTB)

Bug 912368 - Set relativesrcdir in config/tests/src-simple/Makefile and adjust so that it works. r=gps

Bug 911634 - Create a .mozconfig.mk in the objdir when starting a build, and include it from config.mk. r=gps

Bug 899367 - Followup bustage fix for some functions that were renamed out from under me. r=me CLOSED TREE

Some of the uses of this are a bit nonsensical now, but that's a problem for
another day.

Default compartment objects are never gray anymore.

\o/

We need to simultaneously report the new Heap Pointer to the cycle collector,
and remove the old machinery for cycle-collecting the default object via the
JSContext.

We need this explicit API because otherwise the default compartment object will
get set implicitly during the first call to InitClasses.

Bug 899367 - Explicitly traverse outer windows, rather than doing it via JSContext iteration. r=mccr8

Note that this machinery will go away in further patches. But we want to be
deliberate about each of these steps.

This allows us to assert that certain callbacks get invoked during the gray
phase of a marking GC.

We don't cycle collect any other kind, so there's no difference between marking
them gray and letting the JS engine mark them black. This also gets rid of that
nasty code which reset the flag, which billm theorizes has to do with faulty
logic in ContextHolder when creating ephemeral sandbox cxes. The assertion in
this patch should catch us if anything goes wrong.

--HG--
extra : rebase_source : 71c0f776360435d242987ffd3e2cbab8a3535c67