No need for subtree recalc for :-internal-spatial-navigation-focus.

Source/core/css/RuleFeature.cpp

Index: Source/core/css/RuleFeature.cpp
diff --git a/Source/core/css/RuleFeature.cpp b/Source/core/css/RuleFeature.cpp
index 421987966d109a606b0789fc71d49bc26f15d875..f607cd728d0fd1bb6ee5c343f25a3b4259107a8e 100644
--- a/Source/core/css/RuleFeature.cpp
+++ b/Source/core/css/RuleFeature.cpp
@@ -145,6 +145,7 @@ static bool supportsInvalidation(CSSSelector::PseudoType type)
     case CSSSelector::PseudoContent:
     case CSSSelector::PseudoHost:
     case CSSSelector::PseudoShadow:
+    case CSSSelector::PseudoSpatialNavigationFocus:
     case CSSSelector::PseudoListBox:
         return true;
     case CSSSelector::PseudoNotParsed:
@@ -174,7 +175,6 @@ static bool requiresSubtreeInvalidation(const CSSSelector& selector)
     switch (selector.pseudoType()) {
     case CSSSelector::PseudoFirstLine:
     case CSSSelector::PseudoFirstLetter:
-    case CSSSelector::PseudoSpatialNavigationFocus:
         // FIXME: Most pseudo classes/elements above can be supported and moved
         // to assertSupportedPseudo(). Move on a case-by-case basis. If they
         // require subtree invalidation, document why.