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Automatic update from web-platform-tests Reland: Implement style containment scope tree In order to be able to handle quotes (and later counters) with respect to the "contain: style" sub trees, a style containment scope tree has been introduced. It manages quotes by putting them in appropriate scope, creating and deleting scopes when necessary. In this CL the performance regression has been fixed by not creating the style containment scope tree until it's really needed. Fixed: 882385 Change-Id: I93f2237af93791ac9230f62e96ffad61264eafe1 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4487892 Commit-Queue: Daniil Sakhapov <[email protected]> Reviewed-by: Rune Lillesveen <[email protected]> Cr-Commit-Position: refs/heads/main@{#1137110} -- wpt-commits: a30b0907ff255011120e55706ee128b9eddf6176 wpt-pr: 39746