Add a first pass of a class descendant invalidator, and a containing RuleSetAnalyzer

Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 291 matching lines @@
 
     virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
     virtual void detach(const AttachContext& = AttachContext()) OVERRIDE;
     virtual RenderObject* createRenderer(RenderStyle*);
     virtual bool rendererIsNeeded(const RenderStyle&);
     void recalcStyle(StyleRecalcChange, Text* nextTextSibling = 0);
     void didAffectSelector(AffectedSelectorMask);
     void setAnimationStyleChange(bool);
     void setNeedsAnimationStyleRecalc();
 
+    bool needsInvalidation() const;
+
     bool supportsStyleSharing() const;
 
     ElementShadow* shadow() const;
     ElementShadow& ensureShadow();
     PassRefPtr<ShadowRoot> createShadowRoot(ExceptionState&);
     ShadowRoot* shadowRoot() const;
     ShadowRoot* youngestShadowRoot() const;
 
     bool hasAuthorShadowRoot() const { return shadowRoot(); }
     virtual void didAddShadowRoot(ShadowRoot&);
@@ skipping 217 matching lines @@
 protected:
     Element(const QualifiedName& tagName, Document* document, ConstructionType type)
         : ContainerNode(document, type)
         , m_tagName(tagName)
     {
         ScriptWrappable::init(this);
         // FIXME: This RELEASE_ASSERT is temporary; the hope is to track down the cause of http://crbug.com/312410
         RELEASE_ASSERT(document);
     }
 
+    template<typename Checker>
+    bool checkSelectorForClassChange(const SpaceSplitString& changedClasses, const Checker&);
+
+    template<typename Checker>
+    bool checkSelectorForClassChange(const SpaceSplitString& oldClasses, const SpaceSplitString& newClasses, const Checker&);
+
+
     void addPropertyToPresentationAttributeStyle(MutableStylePropertySet*, CSSPropertyID, CSSValueID identifier);
     void addPropertyToPresentationAttributeStyle(MutableStylePropertySet*, CSSPropertyID, double value, CSSPrimitiveValue::UnitTypes);
     void addPropertyToPresentationAttributeStyle(MutableStylePropertySet*, CSSPropertyID, const String& value);
 
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE;
     virtual void removeAllEventListeners() OVERRIDE;
 
     virtual void willRecalcStyle(StyleRecalcChange);
@@ skipping 337 matching lines @@
 }
 
 inline bool isShadowHost(const Element* element)
 {
     return element && element->shadow();
 }
 
 } // namespace
 
 #endif