Avoid calling markAncestorsWithChildNeedsStyleRecalc() constantly in childrenChanged

Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 630 matching lines @@
     void activeChainNodeDetached(Node*);
 
     void updateHoverActiveState(const HitTestRequest&, Element*, const PlatformMouseEvent* = 0);
 
     // Updates for :target (CSS3 selector).
     void setCSSTarget(Element*);
     Element* cssTarget() const { return m_cssTarget; }
 
     void scheduleRenderTreeUpdate();
     bool hasPendingForcedStyleRecalc() const;
+    bool hasPendingStyleRecalc() const { return m_lifecycle.state() == DocumentLifecycle::StyleRecalcPending; }
 
     void registerNodeList(LiveNodeListBase*);
     void unregisterNodeList(LiveNodeListBase*);
     void incrementNodeListWithIdNameCacheCount();
     void decrementNodeListWithIdNameCacheCount();
     bool shouldInvalidateNodeListCaches(const QualifiedName* attrName = 0) const;
     void invalidateNodeListCaches(const QualifiedName* attrName);
 
     void attachNodeIterator(NodeIterator*);
     void detachNodeIterator(NodeIterator*);
@@ skipping 449 matching lines @@
     virtual void reportBlockedScriptExecutionToInspector(const String& directiveText) OVERRIDE FINAL;
     virtual void addMessage(MessageSource, MessageLevel, const String& message, const String& sourceURL, unsigned lineNumber, ScriptState*) OVERRIDE FINAL;
     void internalAddMessage(MessageSource, MessageLevel, const String& message, const String& sourceURL, unsigned lineNumber, PassRefPtr<ScriptCallStack>, ScriptState*);
 
     virtual double timerAlignmentInterval() const OVERRIDE FINAL;
 
     void updateTitle(const String&);
     void updateFocusAppearanceTimerFired(Timer<Document>*);
     void updateBaseURL();
 
-    bool hasPendingStyleRecalc() const { return m_lifecycle.state() == DocumentLifecycle::StyleRecalcPending; }
-
     void executeScriptsWaitingForResourcesIfNeeded();
 
     PassRefPtr<NodeList> handleZeroPadding(const HitTestRequest&, HitTestResult&) const;
 
     void loadEventDelayTimerFired(Timer<Document>*);
     void pluginLoadingTimerFired(Timer<Document>*);
 
     PageVisibilityState pageVisibilityState() const;
 
     PassRefPtr<HTMLCollection> ensureCachedCollection(CollectionType);
@@ skipping 275 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == document();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h