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

Source/core/animation/InertEffect.h

Index: Source/core/animation/InertEffect.h
diff --git a/Source/core/animation/InertEffect.h b/Source/core/animation/InertEffect.h
index e80215abd8438891f5e48859ed33e1358c260e18..afa54bba146f58d2459dca3292c6bafc7391818d 100644
--- a/Source/core/animation/InertEffect.h
+++ b/Source/core/animation/InertEffect.h
@@ -40,9 +40,9 @@ namespace blink {
 
 class CORE_EXPORT InertEffect final : public AnimationEffect {
 public:
-    static PassRefPtrWillBeRawPtr<InertEffect> create(PassRefPtrWillBeRawPtr<EffectModel>, const Timing&, bool paused, double inheritedTime);
-    void sample(OwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>>&);
-    EffectModel* model() const { return m_model.get(); }
+    static InertEffect* create(EffectModel*, const Timing&, bool paused, double inheritedTime);
+    void sample(HeapVector<Member<Interpolation>>*&);
+    EffectModel* model() const { return m_model; }
     bool paused() const { return m_paused; }
 
     DECLARE_VIRTUAL_TRACE();
@@ -52,8 +52,8 @@ protected:
     double calculateTimeToEffectChange(bool forwards, double inheritedTime, double timeToNextIteration) const override;
 
 private:
-    InertEffect(PassRefPtrWillBeRawPtr<EffectModel>, const Timing&, bool paused, double inheritedTime);
-    RefPtrWillBeMember<EffectModel> m_model;
+    InertEffect(EffectModel*, const Timing&, bool paused, double inheritedTime);
+    Member<EffectModel> m_model;
     bool m_paused;
     double m_inheritedTime;
 };