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

Source/core/animation/AnimatableColor.h

Index: Source/core/animation/AnimatableColor.h
diff --git a/Source/core/animation/AnimatableColor.h b/Source/core/animation/AnimatableColor.h
index b8c62f5aa9ef44b646631915fd61e722b2939d62..e18c6578b31fa12e515ef7a7dbf47d0cb2d3ef3a 100644
--- a/Source/core/animation/AnimatableColor.h
+++ b/Source/core/animation/AnimatableColor.h
@@ -59,13 +59,15 @@ private:
 // but inefficient.
 class AnimatableColor FINAL : public AnimatableValue {
 public:
-    static PassRefPtr<AnimatableColor> create(const AnimatableColorImpl&, const AnimatableColorImpl& visitedLinkColor);
+    static PassRefPtrWillBeRawPtr<AnimatableColor> create(const AnimatableColorImpl&, const AnimatableColorImpl& visitedLinkColor);
     Color color() const { return m_color.toColor(); }
     Color visitedLinkColor() const { return m_visitedLinkColor.toColor(); }
 
+    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;
 
 private:
     AnimatableColor(const AnimatableColorImpl& color, const AnimatableColorImpl& visitedLinkColor)