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

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 feaf2ad3029d5e5e6cf308bbbd65482b8e8de0a9..9a53497661fcbb0413aa55ded4cd907c3d22efff 100644
--- a/Source/core/animation/Interpolation.h
+++ b/Source/core/animation/Interpolation.h
@@ -13,7 +13,7 @@ namespace blink {
 
 class PropertyHandle;
 
-class CORE_EXPORT Interpolation : public RefCountedWillBeGarbageCollectedFinalized<Interpolation> {
+class CORE_EXPORT Interpolation : public GarbageCollectedFinalized<Interpolation> {
     WTF_MAKE_NONCOPYABLE(Interpolation);
 public:
     virtual ~Interpolation();
@@ -30,17 +30,17 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
 protected:
-    const OwnPtrWillBeMember<InterpolableValue> m_start;
-    const OwnPtrWillBeMember<InterpolableValue> m_end;
+    const Member<InterpolableValue> m_start;
+    const Member<InterpolableValue> m_end;
 
     mutable double m_cachedFraction;
     mutable int m_cachedIteration;
-    mutable OwnPtrWillBeMember<InterpolableValue> m_cachedValue;
+    mutable Member<InterpolableValue> m_cachedValue;
 
-    Interpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end);
+    Interpolation(InterpolableValue* start, InterpolableValue* end);
 
 private:
-    InterpolableValue* getCachedValueForTesting() const { return m_cachedValue.get(); }
+    InterpolableValue* getCachedValueForTesting() const { return m_cachedValue; }
 
     friend class AnimationInterpolableValueTest;
     friend class AnimationInterpolationEffectTest;