Remove tons of OILPAN.

sky/engine/core/css/PropertySetCSSStyleDeclaration.h

Index: sky/engine/core/css/PropertySetCSSStyleDeclaration.h
diff --git a/sky/engine/core/css/PropertySetCSSStyleDeclaration.h b/sky/engine/core/css/PropertySetCSSStyleDeclaration.h
index be8996a26395c4a8406ffbe796f96a0b62517ef4..7a6f7bddfce9f8de5817ff6a3415250854a4f8af 100644
--- a/sky/engine/core/css/PropertySetCSSStyleDeclaration.h
+++ b/sky/engine/core/css/PropertySetCSSStyleDeclaration.h
@@ -45,8 +45,6 @@ public:
     virtual Element* parentElement() const { return 0; }
     StyleSheetContents* contextStyleSheet() const;
 
-    virtual void trace(Visitor*) override;
-
 private:
     virtual CSSRule* parentRule() const override { return 0; }
     virtual unsigned length() const override final;
@@ -87,8 +85,6 @@ public:
     virtual void deref() override;
 #endif
 
-    virtual void trace(Visitor*) override;
-
 protected:
     virtual MutableStylePropertySet& propertySet() const override final { ASSERT(m_propertySet); return *m_propertySet; }
 
@@ -112,8 +108,6 @@ public:
 
     void reattach(MutableStylePropertySet&);
 
-    virtual void trace(Visitor*) override;
-
 private:
     StyleRuleCSSStyleDeclaration(MutableStylePropertySet&, CSSRule*);
     virtual ~StyleRuleCSSStyleDeclaration();
@@ -139,8 +133,6 @@ public:
     {
     }
 
-    virtual void trace(Visitor*) override;
-
 private:
     virtual MutableStylePropertySet& propertySet() const override;
 #if !ENABLE(OILPAN)