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

Source/core/animation/AnimatableShapeValue.cpp

Index: Source/core/animation/AnimatableShapeValue.cpp
diff --git a/Source/core/animation/AnimatableShapeValue.cpp b/Source/core/animation/AnimatableShapeValue.cpp
index e661e9e907304d0dcad71d8ae8be5b1cfe062c2a..c9f3fa8b920d4a95cc35472b685c971e945bd9b2 100644
--- a/Source/core/animation/AnimatableShapeValue.cpp
+++ b/Source/core/animation/AnimatableShapeValue.cpp
@@ -48,7 +48,7 @@ bool AnimatableShapeValue::usesDefaultInterpolationWith(const AnimatableValue* v
     return !fromShape->canBlend(toShape);
 }
 
-PassRefPtr<AnimatableValue> AnimatableShapeValue::interpolateTo(const AnimatableValue* value, double fraction) const
+PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableShapeValue::interpolateTo(const AnimatableValue* value, double fraction) const
 {
     if (usesDefaultInterpolationWith(value))
         return defaultInterpolateTo(this, value, fraction);
@@ -65,4 +65,9 @@ bool AnimatableShapeValue::equalTo(const AnimatableValue* value) const
     return m_shape == shape || (m_shape && shape && *m_shape == *shape);
 }
 
+void AnimatableShapeValue::trace(Visitor* visitor)
+{
+    AnimatableValue::trace(visitor);
+}
+
 }