Simplify ScopedStyleResolver keyframe handling.

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 59f0558f6bb900e0bf83a8437aee2eeaeca7fefa..7ae23d4342eb1acd13deb6c8ad5e09c8839167ff 100644
--- a/sky/engine/core/css/resolver/ScopedStyleResolver.h
+++ b/sky/engine/core/css/resolver/ScopedStyleResolver.h
@@ -54,8 +54,7 @@ public:
     const TreeScope& treeScope() const { return *m_scope; }
 
 public:
-    const StyleRuleKeyframes* keyframeStylesForAnimation(const StringImpl* animationName);
-    void addKeyframeStyle(PassRefPtr<StyleRuleKeyframes>);
+    const StyleRuleKeyframes* keyframeStylesForAnimation(String animationName);
 
     void collectMatchingAuthorRules(ElementRuleCollector&, bool includeEmptyRules, bool applyAuthorStyles, CascadeScope, CascadeOrder = ignoreCascadeOrder);
     void addRulesFromSheet(CSSStyleSheet*, StyleResolver*);
@@ -70,9 +69,6 @@ private:
     RawPtr<TreeScope> m_scope;
     Vector<RawPtr<CSSStyleSheet> > m_authorStyleSheets;
 
-    typedef HashMap<const StringImpl*, RefPtr<StyleRuleKeyframes> > KeyframesRuleMap;
-    KeyframesRuleMap m_keyframesRuleMap;
-
     RuleFeatureSet m_features;
 };