Bug 1506479 - Discard TypeScripts in Zone::discardJitCode instead of during type sweeping. r?bhackett
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For bug 1499644 I want to add ICScript to TypeScript to not increase sizeof(JSScript). This however introduces some browser-only shutdown GC leaks because the cycle collector traces too many things during its shutdown GC/CC. This is because we purge TypeScripts during type sweeping and this happens after marking. I think the best fix for this is to move TypeScript discarding to Zone::discardJitCode. This is also nice because it means we can discard JIT code + TypeScript before we attempt to relazify functions during shrinking GC (so relazification becomes more effective).
I also had to make some small changes to relazification for XDR tests for that to pass.
Pushed by firstname.lastname@example.org: https://hg.mozilla.org/integration/autoland/rev/9018814d9671 Discard TypeScripts in Zone::discardJitCode instead of during type sweeping. r=bhackett
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