Clean up virtual functions in css/

Source/core/css/CSSKeyframesRule.h

Index: Source/core/css/CSSKeyframesRule.h
diff --git a/Source/core/css/CSSKeyframesRule.h b/Source/core/css/CSSKeyframesRule.h
index 197a79289211841ee4b0488538727c0ca1a7ee50..ef9e45fb7086191b708951578d37ddcf48922d0e 100644
--- a/Source/core/css/CSSKeyframesRule.h
+++ b/Source/core/css/CSSKeyframesRule.h
@@ -82,7 +82,6 @@ public:
 
     virtual ~CSSKeyframesRule();
 
-    virtual CSSRule::Type type() const override { return KEYFRAMES_RULE; }
     virtual String cssText() const override;
     virtual void reattach(StyleRuleBase*) override;
 
@@ -107,6 +106,8 @@ public:
 private:
     CSSKeyframesRule(StyleRuleKeyframes*, CSSStyleSheet* parent);
 
+    virtual CSSRule::Type type() const override { return KEYFRAMES_RULE; }
+
     RefPtrWillBeMember<StyleRuleKeyframes> m_keyframesRule;
     mutable WillBeHeapVector<RefPtrWillBeMember<CSSKeyframeRule> > m_childRuleCSSOMWrappers;
     mutable OwnPtrWillBeMember<CSSRuleList> m_ruleListCSSOMWrapper;