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

Source/core/animation/PathSVGInterpolation.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 PathSVGInterpolation_h
 #define PathSVGInterpolation_h
 
 #include "core/animation/SVGInterpolation.h"
 #include "core/svg/SVGPathSegList.h"
 
 namespace blink {
 
 class PathSVGInterpolation : public SVGInterpolation {
 public:
-    static PassRefPtrWillBeRawPtr<PathSVGInterpolation> maybeCreate(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute);
+    static PathSVGInterpolation* maybeCreate(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute);
 
     PassRefPtrWillBeRawPtr<SVGPropertyBase> interpolatedValue(SVGElement&) const final;
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         SVGInterpolation::trace(visitor);
     }
 
 private:
-    PathSVGInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute,
+    PathSVGInterpolation(InterpolableValue* start, InterpolableValue* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute,
         Vector<SVGPathSegType> pathSegTypes)
         : SVGInterpolation(start, end, attribute)
     {
         m_pathSegTypes.swap(pathSegTypes);
     }
 
     static PassRefPtrWillBeRawPtr<SVGPropertyBase> fromInterpolableValue(const InterpolableValue&, const Vector<SVGPathSegType>&, SVGPathElement*);
 
     Vector<SVGPathSegType> m_pathSegTypes;
 };
 
 }
 
 #endif // NumberSVGInterpolation_h