Implement proposed shadow tree cascade order.

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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 12 matching lines @@
 #define StyleResolver_h
 
 #include "core/CoreExport.h"
 #include "core/animation/PropertyHandle.h"
 #include "core/css/ElementRuleCollector.h"
 #include "core/css/PseudoStyleRequest.h"
 #include "core/css/RuleFeature.h"
 #include "core/css/RuleSet.h"
 #include "core/css/SelectorChecker.h"
 #include "core/css/SelectorFilter.h"
-#include "core/css/TreeBoundaryCrossingRules.h"
 #include "core/css/resolver/CSSPropertyPriority.h"
 #include "core/css/resolver/MatchedPropertiesCache.h"
 #include "core/css/resolver/StyleBuilder.h"
 #include "core/css/resolver/StyleResolverStats.h"
 #include "core/css/resolver/StyleResourceLoader.h"
+#include "core/dom/DocumentOrderedList.h"
 #include "core/style/AuthorStyleInfo.h"
 #include "core/style/CachedUAStyle.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Deque.h"
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
 #include "wtf/ListHashSet.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
@@ skipping 145 matching lines @@
     static AuthorStyleInfo authorStyleInfo(StyleResolverState&);
 
     void loadPendingResources(StyleResolverState&);
     void adjustComputedStyle(StyleResolverState&, Element*);
 
     void appendCSSStyleSheet(CSSStyleSheet&);
 
     void collectPseudoRulesForElement(Element*, ElementRuleCollector&, PseudoId, unsigned rulesToInclude);
     void matchRuleSet(ElementRuleCollector&, RuleSet*);
     void matchUARules(ElementRuleCollector&);
-    void matchAuthorRules(Element*, ElementRuleCollector&, bool includeEmptyRules);
+    void matchAuthorRules(const Element&, ElementRuleCollector&, bool includeEmptyRules);
+    void matchHostRules(const Element&, ElementRuleCollector&, bool includeEmptyRules);
+    void matchElementScopeRules(ScopedStyleResolver&, ElementRuleCollector&, bool includeEmptyRules);
+    void matchScopedRules(const Element&, ElementRuleCollector&, bool includeEmptyRules);
     void matchAllRules(StyleResolverState&, ElementRuleCollector&, bool includeSMILProperties);
     void collectFeatures();
     void resetRuleFeatures();
 
     void applyMatchedProperties(StyleResolverState&, const MatchResult&);
     bool applyAnimatedProperties(StyleResolverState&, const Element* animatingElement);
     void applyCallbackSelectors(StyleResolverState&);
 
     template <CSSPropertyPriority priority>
     void applyMatchedProperties(StyleResolverState&, const MatchedPropertiesRange&, bool important, bool inheritedOnly);
@@ skipping 23 matching lines @@
     OwnPtrWillBeMember<ViewportStyleResolver> m_viewportStyleResolver;
 
     WillBeHeapListHashSet<RawPtrWillBeMember<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;
     OwnPtrWillBeMember<RuleSet> m_siblingRuleSet;
     OwnPtrWillBeMember<RuleSet> m_uncommonAttributeRuleSet;
     OwnPtrWillBeMember<RuleSet> m_watchedSelectorsRules;
-    TreeBoundaryCrossingRules m_treeBoundaryCrossingRules;
+    DocumentOrderedList m_treeBoundaryCrossingScopes;
 
     bool m_needCollectFeatures;
     bool m_printMediaType;
 
     StyleResourceLoader m_styleResourceLoader;
 
     unsigned m_styleSharingDepth;
     WillBeHeapVector<OwnPtrWillBeMember<StyleSharingList>, styleSharingMaxDepth> m_styleSharingLists;
 
     OwnPtr<StyleResolverStats> m_styleResolverStats;
 
     // Use only for Internals::updateStyleAndReturnAffectedElementCount.
     unsigned m_accessCount;
 };
 
 } // namespace blink
 
 #endif // StyleResolver_h