Toshihito Kikuchi 0cc2fc80c7 Bug 1756518 - Delay starting UntrustedModulesProcessor. r=mhowell,necko-reviewers,kershaw
This patch is to delay starting `UntrustedModulesProcessor` to avoid
processing a massive amount of loaded modules in the browser process
during startup.

To achive that, this patch introduces "unblock-untrusted-modules-thread"
notification.  Before the notification, `UntrustedModulesProcessor` is
created but marked as not ready.  This means the processor does not
go beyond `ScheduleNonEmptyQueueProcessing`.  Once the notification is
observed, we propagate it to all existing child processes, and afterward
`UntrustedModulesProcessor` in new processes will be marked ready from
the beginning.

Differential Revision: https://phabricator.services.mozilla.com/D140123
2022-03-05 04:39:05 +00:00
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