Bug 1685643 - Subtract the correct allocation size when freeing items from the shared cache. r=gw
Bug 1685643 - Subtract the correct allocation size when freeing items from the shared cache. r=gw

Differential Revision: https://phabricator.services.mozilla.com/D101104

[ghsync] From https://hg.mozilla.org/mozilla-central/rev/899944ef4aa72a26a3de63d48f952213ec73b2b8

servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender