Handle CSSOM style mutation of font-palette
<rdar://problem/83436572>
Created attachment 439135 [details] Patch
This patch modifies the imported WPT tests. Please ensure that any changes on the tests (not coming from a WPT import) are exported to WPT. Please see https://trac.webkit.org/wiki/WPTExportProcess
Committed r283032 (242092@main): <https://commits.webkit.org/242092@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 439135 [details].