Remove PostAttachCallbacks and replace with something more specialized

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 421 matching lines @@
     // FIXME: Switch all callers of styleResolverChanged to these or better ones and then make them
     // do something smarter.
     void removedStyleSheet(StyleSheet*, RecalcStyleTime when = RecalcStyleDeferred, StyleResolverUpdateMode = FullStyleUpdate);
     void addedStyleSheet(StyleSheet*, RecalcStyleTime when = RecalcStyleDeferred) { styleResolverChanged(when); }
     void modifiedStyleSheet(StyleSheet*, RecalcStyleTime when = RecalcStyleDeferred, StyleResolverUpdateMode = FullStyleUpdate);
     void changedSelectorWatch() { styleResolverChanged(RecalcStyleDeferred); }
 
     void scheduleUseShadowTreeUpdate(SVGUseElement&);
     void unscheduleUseShadowTreeUpdate(SVGUseElement&);
 
+    // FIXME: This should be eliminated and elements that use it should be made to
+    // always have a layer so they don't need to go about creating one from reasons
+    // external to style.
+    void scheduleLayerUpdate(Element&);
+    void unscheduleLayerUpdate(Element&);

[ojan, 2014/03/24 19:39:15]

The overloading of layer to mean RenderLayer and GraphicsLayer is super
confused. I'm not sure which one this is. I guess you're not creating that
problem here since scheduleLayerUpdate already exists on Element.

+
     void evaluateMediaQueryList();
 
     FormController& formController();
     Vector<String> formElementsState() const;
     void setStateForNewFormElements(const Vector<String>&);
 
     FrameView* view() const; // can be null
     LocalFrame* frame() const { return m_frame; } // can be null
     FrameHost* frameHost() const; // can be null
     Page* page() const; // can be null
@@ skipping 617 matching lines @@
 private:
     friend class Node;
     friend class IgnoreDestructiveWriteCountIncrementer;
 
     ScriptedAnimationController& ensureScriptedAnimationController();
     virtual SecurityContext& securityContext() OVERRIDE FINAL { return *this; }
     virtual EventQueue* eventQueue() const OVERRIDE FINAL;
 
     void inheritHtmlAndBodyElementStyles(StyleRecalcChange);
 
+    bool dirtyElementsForLayerUpdate();
     void updateDistributionIfNeeded();
     void updateUseShadowTreesIfNeeded();
 
     void updateStyle(StyleRecalcChange);
 
     void detachParser();
 
     virtual bool isDocument() const OVERRIDE FINAL { return true; }
 
     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE;
@@ skipping 252 matching lines @@
     RefPtr<DocumentTimeline> m_transitionTimeline;
     CSSPendingAnimations m_cssPendingAnimations;
 
     RefPtr<Document> m_templateDocument;
     Document* m_templateDocumentHost; // Manually managed weakref (backpointer from m_templateDocument).
 
     Timer<Document> m_didAssociateFormControlsTimer;
     HashSet<RefPtr<Element> > m_associatedFormControls;
 
     HashSet<SVGUseElement*> m_useElementsNeedingUpdate;
+    HashSet<Element*> m_layerUpdateElements;
 
     bool m_hasViewportUnits;
 
     HashSet<DocumentVisibilityObserver*> m_visibilityObservers;
 };
 
 inline void Document::notifyRemovePendingSheetIfNeeded()
 {
     if (m_needsNotifyRemoveAllPendingStylesheet)
         didRemoveAllPendingStylesheet();
@@ skipping 38 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == document();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h