Oilpan: Move AnimatableValue's hierarchy to oilpan's heap

Source/core/animation/AnimatableImage.h

Index: Source/core/animation/AnimatableImage.h
diff --git a/Source/core/animation/AnimatableImage.h b/Source/core/animation/AnimatableImage.h
index f8b1f5cee3c85b6fb582b27aabc84b2d20344dbc..f1ca13187ef3f4608311b525cfa99d25a1a7bc47 100644
--- a/Source/core/animation/AnimatableImage.h
+++ b/Source/core/animation/AnimatableImage.h
@@ -40,15 +40,17 @@ namespace WebCore {
 class AnimatableImage FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableImage() { }
-    static PassRefPtr<AnimatableImage> create(PassRefPtr<CSSValue> value)
+    static PassRefPtrWillBeRawPtr<AnimatableImage> create(PassRefPtr<CSSValue> value)
     {
-        return adoptRef(new AnimatableImage(value));
+        return adoptRefWillBeNoop(new AnimatableImage(value));
     }
     CSSValue* toCSSValue() const { return m_value.get(); }
 
+    virtual void trace(Visitor*) OVERRIDE;
+
 protected:
-    virtual PassRefPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const OVERRIDE;
-    virtual PassRefPtr<AnimatableValue> addWith(const AnimatableValue*) const OVERRIDE;
+    virtual PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const OVERRIDE;
+    virtual PassRefPtrWillBeRawPtr<AnimatableValue> addWith(const AnimatableValue*) const OVERRIDE;
     virtual bool usesDefaultInterpolationWith(const AnimatableValue*) const OVERRIDE;
 
 private: