Clean up after getPropertyCSSValue

Source/core/css/CSSImageSetValue.cpp

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 161 matching lines @@
 
 bool CSSImageSetValue::hasFailedOrCanceledSubresources() const
 {
     if (!m_imageSet || !m_imageSet->isImageResourceSet())
         return false;
     if (Resource* cachedResource = toStyleFetchedImageSet(m_imageSet)->cachedImage())
         return cachedResource->loadFailedOrCanceled();
     return true;
 }
 
-CSSImageSetValue::CSSImageSetValue(const CSSImageSetValue& cloneFrom)
-    : CSSValueList(cloneFrom)
-    , m_accessedBestFitImage(false)
-    , m_scaleFactor(1)
-{
-    // Non-CSSValueList data is not accessible through CSS OM, no need to clone.
-}
-
-PassRefPtrWillBeRawPtr<CSSImageSetValue> CSSImageSetValue::cloneForCSSOM() const
-{
-    return adoptRefWillBeNoop(new CSSImageSetValue(*this));
-}
-
 } // namespace blink