Add initial support for CSSStyleSheet constructor and TreeScope.adoptedStyleSheets attribute: - https://w3c.github.io/csswg-drafts/cssom-1/#dom-cssstylesheet-cssstylesheet - https://w3c.github.io/csswg-drafts/cssom-1/#extensions-to-the-document-or-shadow-root-interface
Pull request: https://github.com/WebKit/WebKit/pull/4690
Committed 254894@main (6f86bd6200eb): <https://commits.webkit.org/254894@main> Reviewed commits have been landed. Closing PR #4690 and removing active labels.
<rdar://problem/100441340>