Remove more oilpan.

sky/engine/core/css/CSSStyleDeclaration.h

Index: sky/engine/core/css/CSSStyleDeclaration.h
diff --git a/sky/engine/core/css/CSSStyleDeclaration.h b/sky/engine/core/css/CSSStyleDeclaration.h
index 961fcad53c79c9cfe7f234e31329ce9d13bfd079..4d51e5ad039f77f702f5f3e7f2c9e35efa3305c6 100644
--- a/sky/engine/core/css/CSSStyleDeclaration.h
+++ b/sky/engine/core/css/CSSStyleDeclaration.h
@@ -35,9 +35,9 @@ class CSSValue;
 class ExceptionState;
 class MutableStylePropertySet;
 
-class CSSStyleDeclaration : public DummyBase<CSSStyleDeclaration>, public ScriptWrappable {
+class CSSStyleDeclaration : public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
-    WTF_MAKE_NONCOPYABLE(CSSStyleDeclaration); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
+    WTF_MAKE_NONCOPYABLE(CSSStyleDeclaration); WTF_MAKE_FAST_ALLOCATED;
 public:
     virtual ~CSSStyleDeclaration() { }