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

Source/core/animation/SVGStrokeDasharrayStyleInterpolation.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 SVGStrokeDasharrayStyleInterpolation_h
 #define SVGStrokeDasharrayStyleInterpolation_h
 
 #include "core/CoreExport.h"
 #include "core/animation/StyleInterpolation.h"
 #include "core/css/CSSPrimitiveValue.h"
 
 namespace blink {
 
 class CSSValueList;
 
 class CORE_EXPORT SVGStrokeDasharrayStyleInterpolation : public StyleInterpolation {
 public:
-    static PassRefPtrWillBeRawPtr<SVGStrokeDasharrayStyleInterpolation> maybeCreate(const CSSValue& start, const CSSValue& end, CSSPropertyID);
+    static SVGStrokeDasharrayStyleInterpolation* maybeCreate(const CSSValue& start, const CSSValue& end, CSSPropertyID);
 
     void apply(StyleResolverState&) const override;
 
     void trace(Visitor* visitor) override
     {
         StyleInterpolation::trace(visitor);
     }
 
 private:
-    SVGStrokeDasharrayStyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, CSSPropertyID id)
+    SVGStrokeDasharrayStyleInterpolation(InterpolableValue* start, InterpolableValue* end, CSSPropertyID id)
         : StyleInterpolation(start, end, id)
     { }
 
     static bool canCreateFrom(const CSSValue&);
     static PassRefPtrWillBeRawPtr<CSSValueList> interpolableValueToStrokeDasharray(const InterpolableValue&);
 
     friend class AnimationSVGStrokeDasharrayStyleInterpolationTest;
 };
 
 }
 
 #endif // SVGStrokeDasharrayStyleInterpolation_h