Avoid calling markAncestorsWithChildNeedsStyleRecalc() constantly in childrenChanged

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index 0cfd6712f3b22b0ea5b416b9d4c44deea5559b68..5c59078dd0f35b1fa38040addf9f31bcf27c3c22 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -648,6 +648,7 @@ public:
 
     void scheduleRenderTreeUpdate();
     bool hasPendingForcedStyleRecalc() const;
+    bool hasPendingStyleRecalc() const { return m_lifecycle.state() == DocumentLifecycle::StyleRecalcPending; }
 
     void registerNodeList(LiveNodeListBase*);
     void unregisterNodeList(LiveNodeListBase*);
@@ -1117,8 +1118,6 @@ private:
     void updateFocusAppearanceTimerFired(Timer<Document>*);
     void updateBaseURL();
 
-    bool hasPendingStyleRecalc() const { return m_lifecycle.state() == DocumentLifecycle::StyleRecalcPending; }
-
     void executeScriptsWaitingForResourcesIfNeeded();
 
     PassRefPtr<NodeList> handleZeroPadding(const HitTestRequest&, HitTestResult&) const;