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

Source/core/animation/AnimatableClipPathOperation.cpp

Index: Source/core/animation/AnimatableClipPathOperation.cpp
diff --git a/Source/core/animation/AnimatableClipPathOperation.cpp b/Source/core/animation/AnimatableClipPathOperation.cpp
index e72221b45b71771c6c80499c99ad89e3b171ba95..0d1ecc9fb08ce2b0cc18a56a4d39b43d28a950b1 100644
--- a/Source/core/animation/AnimatableClipPathOperation.cpp
+++ b/Source/core/animation/AnimatableClipPathOperation.cpp
@@ -46,7 +46,7 @@ bool AnimatableClipPathOperation::usesDefaultInterpolationWith(const AnimatableV
     return !fromShape->canBlend(toShape);
 }
 
-PassRefPtr<AnimatableValue> AnimatableClipPathOperation::interpolateTo(const AnimatableValue* value, double fraction) const
+PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableClipPathOperation::interpolateTo(const AnimatableValue* value, double fraction) const
 {
     if (usesDefaultInterpolationWith(value))
         return defaultInterpolateTo(this, value, fraction);
@@ -64,4 +64,9 @@ bool AnimatableClipPathOperation::equalTo(const AnimatableValue* value) const
     return m_operation == operation || (m_operation && operation && *m_operation == *operation);
 }
 
+void AnimatableClipPathOperation::trace(Visitor* visitor)
+{
+    AnimatableValue::trace(visitor);
+}
+
 }