CSSValue Immediates: Change CSSValue to an object instead of a pointer

Source/core/style/StyleGeneratedImage.cpp

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 19 matching lines @@
 
 namespace blink {
 
 StyleGeneratedImage::StyleGeneratedImage(PassRefPtrWillBeRawPtr<CSSImageGeneratorValue> value)
     : m_imageGeneratorValue(value)
     , m_fixedSize(m_imageGeneratorValue->isFixedSize())
 {
     m_isGeneratedImage = true;
 }
 
-PassRefPtrWillBeRawPtr<CSSValue> StyleGeneratedImage::cssValue() const
+NullableCSSValue StyleGeneratedImage::cssValue() const
 {
     return m_imageGeneratorValue.get();
 }
 
 LayoutSize StyleGeneratedImage::imageSize(const LayoutObject* layoutObject, float multiplier) const
 {
     if (m_fixedSize) {
         LayoutSize fixedSize(m_imageGeneratorValue->fixedSize(layoutObject));
         if (multiplier == 1.0f)
             return fixedSize;
@@ skipping 37 matching lines @@
 {
     return m_imageGeneratorValue->image(layoutObject, size);
 }
 
 bool StyleGeneratedImage::knownToBeOpaque(const LayoutObject* layoutObject) const
 {
     return m_imageGeneratorValue->knownToBeOpaque(layoutObject);
 }
 
 }