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

Source/core/animation/AnimatableClipPathOperation.h

Index: Source/core/animation/AnimatableClipPathOperation.h
diff --git a/Source/core/animation/AnimatableClipPathOperation.h b/Source/core/animation/AnimatableClipPathOperation.h
index 5d798c2ef5ca34c4b2c852c4a9cff2212b21d88d..2cffa78505295539a4ea8801e56b5f7fc9e128c7 100644
--- a/Source/core/animation/AnimatableClipPathOperation.h
+++ b/Source/core/animation/AnimatableClipPathOperation.h
@@ -39,14 +39,16 @@ namespace WebCore {
 class AnimatableClipPathOperation FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableClipPathOperation() { }
-    static PassRefPtr<AnimatableClipPathOperation> create(ClipPathOperation* operation)
+    static PassRefPtrWillBeRawPtr<AnimatableClipPathOperation> create(ClipPathOperation* operation)
     {
-        return adoptRef(new AnimatableClipPathOperation(operation));
+        return adoptRefWillBeNoop(new AnimatableClipPathOperation(operation));
     }
     ClipPathOperation* clipPathOperation() const { return m_operation.get(); }
 
+    virtual void trace(Visitor*) OVERRIDE { }
+
 protected:
-    virtual PassRefPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const OVERRIDE;
+    virtual PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const OVERRIDE;
     virtual bool usesDefaultInterpolationWith(const AnimatableValue*) const OVERRIDE;
 
 private: