Fix markAncestorsWithChildNeedsStyleInvalidation to actually mark only ancestors.

Source/core/dom/Node.cpp

Index: Source/core/dom/Node.cpp
diff --git a/Source/core/dom/Node.cpp b/Source/core/dom/Node.cpp
index 59a60dc30368c59a007a4977c004225c0132f7e4..fd21496a66b511e2e28694d47baf1f617357b67b 100644
--- a/Source/core/dom/Node.cpp
+++ b/Source/core/dom/Node.cpp
@@ -648,8 +648,7 @@ void Node::setNeedsStyleInvalidation()
 
 void Node::markAncestorsWithChildNeedsStyleInvalidation()
 {
-    Node* node = this;
-    for (; node && !node->childNeedsStyleInvalidation(); node = node->parentOrShadowHostNode())
+    for (Node* node = parentOrShadowHostNode(); node && !node->childNeedsStyleInvalidation(); node = node->parentOrShadowHostNode())
         node->setChildNeedsStyleInvalidation();
     if (document().childNeedsStyleInvalidation())
         document().scheduleStyleRecalc();