Remove needsShadowTreeWalker flag

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index ec5ea6b358124dc7e986ab2aa8dfddf4b099dd21..65ae13bd3610fff548314311abcde5ad1d9eaef5 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -2285,7 +2285,7 @@ void Element::updatePseudoElement(PseudoId pseudoId, StyleChange change)
         // when RenderObject::isChildAllowed on our parent returns false for the
         // PseudoElement's renderer for each style recalc.
         if (!renderer() || !pseudoElementRendererIsNeeded(renderer()->getCachedPseudoStyle(pseudoId)))
-            setPseudoElement(pseudoId, 0);
+            elementRareData()->setPseudoElement(pseudoId, 0);
     } else if (change >= Inherit || needsStyleRecalc())
         createPseudoElementIfNeeded(pseudoId);
 }
@@ -2304,12 +2304,7 @@ void Element::createPseudoElementIfNeeded(PseudoId pseudoId)
     ASSERT(!isPseudoElement());
     RefPtr<PseudoElement> element = PseudoElement::create(this, pseudoId);
     element->attach();
-    setPseudoElement(pseudoId, element.release());
-}
-
-bool Element::hasPseudoElements() const
-{
-    return hasRareData() && elementRareData()->hasPseudoElements();
+    ensureElementRareData()->setPseudoElement(pseudoId, element.release());
 }
 
 PseudoElement* Element::pseudoElement(PseudoId pseudoId) const
@@ -2317,12 +2312,6 @@ PseudoElement* Element::pseudoElement(PseudoId pseudoId) const
     return hasRareData() ? elementRareData()->pseudoElement(pseudoId) : 0;
 }
 
-void Element::setPseudoElement(PseudoId pseudoId, PassRefPtr<PseudoElement> element)
-{
-    ensureElementRareData()->setPseudoElement(pseudoId, element);
-    resetNeedsShadowTreeWalker();
-}
-
 RenderObject* Element::pseudoElementRenderer(PseudoId pseudoId) const
 {
     if (PseudoElement* element = pseudoElement(pseudoId))