9bb1c47

Skip pure pseudo-element rules in some cases in collectMatchingRulesForListSlow()
https://bugs.webkit.org/show_bug.cgi?id=305465

Reviewed by NOBODY (OOPS!).

Skip pure pseudo-element rules in ElementRuleCollector::collectMatchingRulesForListSlow()
when we are not matching pseudo elements. This avoids going unnecessarily
through the matching logic and results in a 1.2% speedup on Speedometer 3.

* Source/WebCore/style/ElementRuleCollector.cpp:
(WebCore::Style::ElementRuleCollector::collectMatchingRulesForListSlow):
* Source/WebCore/style/RuleData.cpp:
(WebCore::Style::computeSubjectIsPurePseudoElement):
(WebCore::Style::RuleData::RuleData):
* Source/WebCore/style/RuleData.h:
(WebCore::Style::RuleData::subjectIsPurePseudoElement const):

9bb1c47

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	❌ 🧪 wpe-wk2	🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	❌ 🧪 ios-wk2	⏳ 🧪 api-mac	✅ 🧪 api-wpe		✅ 🛠 vision-apple
	❌ 🧪 ios-wk2-wpt	❌ 🧪 api-mac-debug	✅ 🛠 wpe-cairo-libwebrtc
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	❌ 🧪 mac-wk2	❌ 🧪 gtk-wk2
	✅ 🛠 vision-sim	❌ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	❌ 🧪 mac-intel-wk2
	🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim