[Oilpan] Migrate most classes under core/animations to Oilpan heap.

Source/core/animation/TransformSVGInterpolation.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TransformSVGInterpolation_h
 #define TransformSVGInterpolation_h
 
 #include "core/animation/SVGInterpolation.h"
 #include "core/svg/SVGTransformList.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
 class TransformSVGInterpolation {
     STATIC_ONLY(TransformSVGInterpolation);
 public:
     typedef SVGTransformList ListType;
     typedef SVGTransformType NonInterpolableType;
 
     static bool canCreateFrom(SVGTransform* start, SVGTransform* end);
 
     static PassRefPtrWillBeRawPtr<SVGTransformList> createList(const SVGAnimatedPropertyBase&)
     {
         return SVGTransformList::create();
     }
 
-    static PassOwnPtrWillBeRawPtr<InterpolableValue> toInterpolableValue(SVGTransform*, const SVGAnimatedPropertyBase*, SVGTransformType*);
+    static InterpolableValue* toInterpolableValue(SVGTransform*, const SVGAnimatedPropertyBase*, SVGTransformType*);
 
     static PassRefPtrWillBeRawPtr<SVGTransform> fromInterpolableValue(const InterpolableValue&, SVGTransformType, const SVGElement*);
 };
 
 }
 
 #endif // TransformSVGInterpolation_h