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c04f0a7345
In this change we: - stop treating the nsPluginDirServiceProvider as a directory provider, as its GetFile implementation was a no-op anyway - registering it didn't make any difference. - stop treating it as a class entirely, because the PLID getters were already static, so instantiating it also didn't do anything. - move IO from the plugin directory list provider and the Windows-only PLID getters into nsPluginHost. This enables us to move it off of the main thread later - the directory getting has to happen on the main thread, but we can postpone further checks on the nsIFile instances. - in the process, stop doing exists() calls on files because we can fail more lazily. This allows us to remove more allowlist entries from browser_startup_mainthreadio, though the `isDirectory` calls will actually still cause IO - they don't seem to create IO markers in the profiler. We will move this IO away from the main thread in subsequent commits. Depends on D48328 Differential Revision: https://phabricator.services.mozilla.com/D48329 --HG-- extra : moz-landing-system : lando
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