By broad agreement we are going to remove PJS from the SpiderMonkey code base. PJS is currently Nightly-only, has very limited future prospects in its current form, gets little attention (both in its implementation and by prospective users), and occasionally gets in the way of other work on the engine. Apart from a patch to disable the feature in Nightly, which I will file below, specific work items should be filed as bugs that block this bug. Regarding the division of work, Shu has agreed to tackle the "runtime" bits except for GC, and I will do the GC bits. Things that fall outside those areas might be JIT code and test code (and perhaps the selfhosting code though that has some "runtime" aspects).
Created attachment 8543942 [details] [diff] [review] bug1117724-disable-pjs.diff
Comment on attachment 8543942 [details] [diff] [review] bug1117724-disable-pjs.diff Missed a bit, new patch coming.
Comment on attachment 8543942 [details] [diff] [review] bug1117724-disable-pjs.diff Moved to bug 1117764 and updated.