Clean up virtual functions in css/

Source/core/css/CSSPageRule.h

Index: Source/core/css/CSSPageRule.h
diff --git a/Source/core/css/CSSPageRule.h b/Source/core/css/CSSPageRule.h
index a7ce3282eb2fb88b90e00365aad89e6ee8fac17f..50cb4af09e2a1bc56170787415b39c5d11d98156 100644
--- a/Source/core/css/CSSPageRule.h
+++ b/Source/core/css/CSSPageRule.h
@@ -42,7 +42,6 @@ public:
 
     virtual ~CSSPageRule();
 
-    virtual CSSRule::Type type() const override { return PAGE_RULE; }
     virtual String cssText() const override;
     virtual void reattach(StyleRuleBase*) override;
 
@@ -56,6 +55,8 @@ public:
 private:
     CSSPageRule(StyleRulePage*, CSSStyleSheet*);
 
+    virtual CSSRule::Type type() const override { return PAGE_RULE; }
+
     RefPtrWillBeMember<StyleRulePage> m_pageRule;
     mutable RefPtrWillBeMember<StyleRuleCSSStyleDeclaration> m_propertiesCSSOMWrapper;
 };