Backend for css rule tracking

third_party/WebKit/Source/core/css/resolver/StyleResolver.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 40 matching lines @@
 class CSSValue;
 class ContainerNode;
 class Document;
 class Element;
 class Interpolation;
 class MatchResult;
 class MediaQueryEvaluator;
 class ScopedStyleResolver;
 class StylePropertySet;
 class StyleRule;
+class StyleRuleUsageTracker;
 
 enum StyleSharingBehavior {
   AllowStyleSharing,
   DisallowStyleSharing,
 };
 
 enum RuleMatchingBehavior { MatchAllRules, MatchAllRulesExcludingSMIL };
 
 const unsigned styleSharingListSize = 15;
 const unsigned styleSharingMaxDepth = 32;
@@ skipping 116 matching lines @@
 
   void increaseStyleSharingDepth() { ++m_styleSharingDepth; }
   void decreaseStyleSharingDepth() { --m_styleSharingDepth; }
 
   PseudoElement* createPseudoElementIfNeeded(Element& parent, PseudoId);
 
   DECLARE_TRACE();
 
   void initWatchedSelectorRules();
 
+  void setRuleUsageTracker(StyleRuleUsageTracker*);
+
  private:
   explicit StyleResolver(Document&);
 
   PassRefPtr<ComputedStyle> initialStyleForElement();
 
   // FIXME: This should probably go away, folded into FontBuilder.
   void updateFont(StyleResolverState&);
 
+  void addMatchedRulesToTracker(const ElementRuleCollector&);
+
   void loadPendingResources(StyleResolverState&);
   void adjustComputedStyle(StyleResolverState&, Element*);
 
   void appendCSSStyleSheet(CSSStyleSheet&);
 
   void collectPseudoRulesForElement(const Element&,
                                     ElementRuleCollector&,
                                     PseudoId,
                                     unsigned rulesToInclude);
   void matchRuleSet(ElementRuleCollector&, RuleSet*);
@@ skipping 63 matching lines @@
   HeapListHashSet<Member<CSSStyleSheet>, 16> m_pendingStyleSheets;
 
   // FIXME: The entire logic of collecting features on StyleResolver, as well as
   // transferring them between various parts of machinery smells wrong. This
   // needs to be better somehow.
   RuleFeatureSet m_features;
   Member<RuleSet> m_siblingRuleSet;
   Member<RuleSet> m_uncommonAttributeRuleSet;
   Member<RuleSet> m_watchedSelectorsRules;
 
+  Member<StyleRuleUsageTracker> m_tracker;
+
   bool m_needCollectFeatures;
   bool m_printMediaType;
   bool m_hasFullscreenUAStyle = false;
 
   unsigned m_styleSharingDepth;
   HeapVector<Member<StyleSharingList>, styleSharingMaxDepth>
       m_styleSharingLists;
 };
 
 }  // namespace blink
 
 #endif  // StyleResolver_h