Allow declaration from non-local scope in matched declarations cache

https://bugs.webkit.org/show_bug.cgi?id=259053
rdar://112011597

Reviewed by Ryosuke Niwa.

This allows caching of :host rules for example.

* Source/WebCore/style/ElementRuleCollector.cpp:
(WebCore::Style::ElementRuleCollector::addMatchedProperties):

Scopes are already included in the cache key so we can just enable this.

Canonical link: https://commits.webkit.org/266030@main

Source/WebCore/style/ElementRuleCollector.cpp

@@ -663,9 +663,6 @@ void ElementRuleCollector::addMatchedProperties(MatchedProperties&& matchedPrope
         if (!m_result->isCacheable)
             return false;
 
-        if (matchedProperties.styleScopeOrdinal != ScopeOrdinal::Element)
-            return false;
-
         for (auto current : matchedProperties.properties.get()) {
             // Currently the property cache only copy the non-inherited values and resolve
             // the inherited ones.