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

Source/core/animation/RectSVGInterpolation.h

Index: Source/core/animation/RectSVGInterpolation.h
diff --git a/Source/core/animation/RectSVGInterpolation.h b/Source/core/animation/RectSVGInterpolation.h
index 5c07ff0e4cfc8b5887a54e092bfca317c33796cf..f15be2b0f1847f2a2b80bd3a6c530c0f7e5f7cb9 100644
--- a/Source/core/animation/RectSVGInterpolation.h
+++ b/Source/core/animation/RectSVGInterpolation.h
@@ -14,9 +14,9 @@ class SVGRect;
 
 class RectSVGInterpolation : public SVGInterpolation {
 public:
-    static PassRefPtrWillBeRawPtr<RectSVGInterpolation> create(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute)
+    static RectSVGInterpolation* create(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute)
     {
-        return adoptRefWillBeNoop(new RectSVGInterpolation(toInterpolableValue(start), toInterpolableValue(end), attribute));
+        return new RectSVGInterpolation(toInterpolableValue(start), toInterpolableValue(end), attribute);
     }
 
     virtual PassRefPtrWillBeRawPtr<SVGPropertyBase> interpolatedValue(SVGElement&) const override final
@@ -30,12 +30,12 @@ public:
     }
 
 private:
-    RectSVGInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute)
+    RectSVGInterpolation(InterpolableValue* start, InterpolableValue* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute)
         : SVGInterpolation(start, end, attribute)
     {
     }
 
-    static PassOwnPtrWillBeRawPtr<InterpolableValue> toInterpolableValue(SVGPropertyBase*);
+    static InterpolableValue* toInterpolableValue(SVGPropertyBase*);
 
     static PassRefPtrWillBeRawPtr<SVGRect> fromInterpolableValue(const InterpolableValue&);
 };