Store features in the ScopedStyleResoolver.

sky/engine/core/css/resolver/ScopedStyleResolver.h

Index: sky/engine/core/css/resolver/ScopedStyleResolver.h
diff --git a/sky/engine/core/css/resolver/ScopedStyleResolver.h b/sky/engine/core/css/resolver/ScopedStyleResolver.h
index 48c10585e33a2cf0425fd4135894d4e58bf48742..59f0558f6bb900e0bf83a8437aee2eeaeca7fefa 100644
--- a/sky/engine/core/css/resolver/ScopedStyleResolver.h
+++ b/sky/engine/core/css/resolver/ScopedStyleResolver.h
@@ -39,6 +39,7 @@ namespace blink {
 
 class StyleResolver;
 class StyleSheetContents;
+class RuleFeatureSet;
 
 // This class selects a RenderStyle for a given element based on a collection of stylesheets.
 class ScopedStyleResolver final {
@@ -58,9 +59,11 @@ public:
 
     void collectMatchingAuthorRules(ElementRuleCollector&, bool includeEmptyRules, bool applyAuthorStyles, CascadeScope, CascadeOrder = ignoreCascadeOrder);
     void addRulesFromSheet(CSSStyleSheet*, StyleResolver*);
-    void collectFeaturesTo(RuleFeatureSet&, HashSet<const StyleSheetContents*>& visitedSharedStyleSheetContents) const;
+
     void resetAuthorStyle();
 
+    const RuleFeatureSet& features() const { return m_features; }
+
 private:
     explicit ScopedStyleResolver(TreeScope&);
 
@@ -69,6 +72,8 @@ private:
 
     typedef HashMap<const StringImpl*, RefPtr<StyleRuleKeyframes> > KeyframesRuleMap;
     KeyframesRuleMap m_keyframesRuleMap;
+
+    RuleFeatureSet m_features;
 };
 
 } // namespace blink