Revert of Oilpan: Move CSSStyleDeclaration and subclasses to the heap using transistion types.

Source/core/css/CSSComputedStyleDeclaration.h

Index: Source/core/css/CSSComputedStyleDeclaration.h
diff --git a/Source/core/css/CSSComputedStyleDeclaration.h b/Source/core/css/CSSComputedStyleDeclaration.h
index 780e89abc76ec792a5d714bf0eb921044b7bc444..5c9dc095bee70f98966405e9106c2c856ecb1c38 100644
--- a/Source/core/css/CSSComputedStyleDeclaration.h
+++ b/Source/core/css/CSSComputedStyleDeclaration.h
@@ -49,16 +49,14 @@
 
 class CSSComputedStyleDeclaration FINAL : public CSSStyleDeclaration {
 public:
-    static PassRefPtrWillBeRawPtr<CSSComputedStyleDeclaration> create(PassRefPtr<Node> node, bool allowVisitedStyle = false, const String& pseudoElementName = String())
+    static PassRefPtr<CSSComputedStyleDeclaration> create(PassRefPtr<Node> node, bool allowVisitedStyle = false, const String& pseudoElementName = String())
     {
-        return adoptRefWillBeNoop(new CSSComputedStyleDeclaration(node, allowVisitedStyle, pseudoElementName));
+        return adoptRef(new CSSComputedStyleDeclaration(node, allowVisitedStyle, pseudoElementName));
     }
     virtual ~CSSComputedStyleDeclaration();
 
-#if !ENABLE(OILPAN)
     virtual void ref() OVERRIDE;
     virtual void deref() OVERRIDE;
-#endif
 
     PassRefPtrWillBeRawPtr<CSSValue> getPropertyCSSValue(CSSPropertyID) const;
     String getPropertyValue(CSSPropertyID) const;
@@ -72,8 +70,6 @@
     PassRefPtrWillBeRawPtr<CSSValue> getSVGPropertyCSSValue(CSSPropertyID, EUpdateLayout) const;
 
     PassRefPtrWillBeRawPtr<MutableStylePropertySet> copyPropertiesInSet(const Vector<CSSPropertyID>&) const;
-
-    virtual void trace(Visitor* visitor) { }
 
 private:
     CSSComputedStyleDeclaration(PassRefPtr<Node>, bool allowVisitedStyle, const String&);