Need to check for positional rules on parent with style change.

Source/core/dom/ContainerNode.cpp

Index: Source/core/dom/ContainerNode.cpp
diff --git a/Source/core/dom/ContainerNode.cpp b/Source/core/dom/ContainerNode.cpp
index 8a7ec24084f12d225604a4b47866be539df3f0d4..ef20bb6ea9237c822c4032474b4d2f068026a3a3 100644
--- a/Source/core/dom/ContainerNode.cpp
+++ b/Source/core/dom/ContainerNode.cpp
@@ -1345,9 +1345,6 @@ void ContainerNode::checkForSiblingStyleChanges(SiblingCheckType changeType, Nod
     if (!inActiveDocument() || document().hasPendingForcedStyleRecalc() || styleChangeType() >= SubtreeStyleChange)
         return;
 
-    if (needsStyleRecalc() && childrenAffectedByPositionalRules())
-        return;
-
     // Forward positional selectors include nth-child, nth-of-type, first-of-type and only-of-type.
     // The indirect adjacent selector is the ~ selector.
     // Backward positional selectors include nth-last-child, nth-last-of-type, last-of-type and only-of-type.