Oilpan: Unship CSSValues and AnimatableValues

Source/core/css/CSSImageGeneratorValue.h

Index: Source/core/css/CSSImageGeneratorValue.h
diff --git a/Source/core/css/CSSImageGeneratorValue.h b/Source/core/css/CSSImageGeneratorValue.h
index f664d137220f8e8fb9c009829c1d2d1203dae02d..ad8a8d8b97cee89c75b6ea6851483cd6f1700610 100644
--- a/Source/core/css/CSSImageGeneratorValue.h
+++ b/Source/core/css/CSSImageGeneratorValue.h
@@ -68,8 +68,6 @@ public:
 
     void loadSubimages(Document*);
 
-    DEFINE_INLINE_TRACE_AFTER_DISPATCH() { CSSValue::traceAfterDispatch(visitor); }
-
 protected:
     explicit CSSImageGeneratorValue(ClassType);
 
@@ -80,13 +78,6 @@ protected:
     HashCountedSet<IntSize> m_sizes; // A count of how many times a given image size is in use.
     LayoutObjectSizeCountMap m_clients; // A map from LayoutObjects (with entry count) to image sizes.
     HashMap<IntSize, RefPtr<Image>> m_images; // A cache of Image objects by image size.
-
-#if ENABLE(OILPAN)
-    // FIXME: Oilpan: when/if we can make the layoutObject point directly to the CSSImageGenerator value using
-    // a member we don't need to have this hack where we keep a persistent to the instance as long as
-    // there are clients in the LayoutObjectSizeCountMap.
-    SelfKeepAlive<CSSImageGeneratorValue> m_keepAlive;
-#endif
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSImageGeneratorValue, isImageGeneratorValue());