Don't store a RuleFeatureSet on ScopedStyleResolver.

sky/engine/core/css/resolver/ScopedStyleResolver.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.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 24 matching lines @@
 #include "sky/engine/wtf/HashMap.h"
 #include "sky/engine/wtf/HashSet.h"
 #include "sky/engine/wtf/OwnPtr.h"
 #include "sky/engine/wtf/PassOwnPtr.h"
 
 namespace blink {
 
 class CSSStyleSheet;
 class ContainerNode;
 class HTMLStyleElement;
-class RuleFeatureSet;
 class StyleSheetContents;
 
 // This class selects a RenderStyle for a given element based on a collection of stylesheets.
 class ScopedStyleResolver final {
     WTF_MAKE_NONCOPYABLE(ScopedStyleResolver);
     WTF_MAKE_FAST_ALLOCATED;
 public:
     static PassOwnPtr<ScopedStyleResolver> create(TreeScope& scope)
     {
         return adoptPtr(new ScopedStyleResolver(scope));
     }
 
     const TreeScope& treeScope() const { return m_scope; }
 
     const StyleRuleKeyframes* keyframeStylesForAnimation(String animationName);
 
     void collectMatchingAuthorRules(ElementRuleCollector&, CascadeOrder = ignoreCascadeOrder);
     void collectMatchingHostRules(ElementRuleCollector&, CascadeOrder = ignoreCascadeOrder);
 
-    const RuleFeatureSet& features() const { return m_features; }
+    bool hasSelectorForId(const AtomicString& id) const;
+    bool hasSelectorForClass(const AtomicString& className) const;
+    bool hasSelectorForAttribute(const AtomicString& attributeName) const;
 
     void updateActiveStyleSheets();
 
-    Vector<RefPtr<CSSStyleSheet>>& authorStyleSheets() { return m_authorStyleSheets; }
     const Vector<RefPtr<CSSStyleSheet>>& authorStyleSheets() const { return m_authorStyleSheets; }
 
     void addStyleSheetCandidateNode(HTMLStyleElement&);
     void removeStyleSheetCandidateNode(HTMLStyleElement&);
 
 private:
     explicit ScopedStyleResolver(TreeScope&);
 
-    void appendStyleSheet(CSSStyleSheet&);
     void collectStyleSheets(Vector<RefPtr<CSSStyleSheet>>& candidateSheets);
 
     TreeScope& m_scope;
     DocumentOrderedList m_styleSheetCandidateNodes;
     Vector<RefPtr<CSSStyleSheet>> m_authorStyleSheets;
-    RuleFeatureSet m_features;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_CSS_RESOLVER_SCOPEDSTYLERESOLVER_H_