Oilpan: fix build after r189490 (a22afce3).

Source/core/animation/Interpolation.h

Index: Source/core/animation/Interpolation.h
diff --git a/Source/core/animation/Interpolation.h b/Source/core/animation/Interpolation.h
index 997f22524794539ad7852b84be5e7c8d1d3210fb..88f49f15d8fdf6b89d2c699e65d713f8a9c3e446 100644
--- a/Source/core/animation/Interpolation.h
+++ b/Source/core/animation/Interpolation.h
@@ -10,14 +10,15 @@
 
 namespace blink {
 
-class Interpolation : public RefCountedWillBeGarbageCollected<Interpolation> {
-    DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(Interpolation);
+class Interpolation : public RefCountedWillBeGarbageCollectedFinalized<Interpolation> {
 public:
     static PassRefPtrWillBeRawPtr<Interpolation> create(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end)
     {
         return adoptRefWillBeNoop(new Interpolation(start, end));
     }
 
+    virtual ~Interpolation();
+
     void interpolate(int iteration, double fraction) const;
 
     virtual bool isStyleInterpolation() const { return false; }