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

Source/core/animation/SVGStrokeDasharrayStyleInterpolationTest.cpp

Index: Source/core/animation/SVGStrokeDasharrayStyleInterpolationTest.cpp
diff --git a/Source/core/animation/SVGStrokeDasharrayStyleInterpolationTest.cpp b/Source/core/animation/SVGStrokeDasharrayStyleInterpolationTest.cpp
index 37fb08c9f953de4cba656e8e200797e2e8820f70..5dc78229d267a7937ec38fb4ff64b0472ee25513 100644
--- a/Source/core/animation/SVGStrokeDasharrayStyleInterpolationTest.cpp
+++ b/Source/core/animation/SVGStrokeDasharrayStyleInterpolationTest.cpp
@@ -21,7 +21,7 @@ protected:
 
     static PassRefPtrWillBeRawPtr<CSSValueList> roundTrip(const CSSValue& value)
     {
-        RefPtrWillBeRawPtr<SVGStrokeDasharrayStyleInterpolation> interpolation = SVGStrokeDasharrayStyleInterpolation::maybeCreate(value, value, CSSPropertyStrokeDasharray);
+        SVGStrokeDasharrayStyleInterpolation* interpolation = SVGStrokeDasharrayStyleInterpolation::maybeCreate(value, value, CSSPropertyStrokeDasharray);
         ASSERT(interpolation);
         return SVGStrokeDasharrayStyleInterpolation::interpolableValueToStrokeDasharray(*interpolation->m_start);
     }