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

Source/core/animation/animatable/AnimatableLengthPoint.h

Index: Source/core/animation/animatable/AnimatableLengthPoint.h
diff --git a/Source/core/animation/animatable/AnimatableLengthPoint.h b/Source/core/animation/animatable/AnimatableLengthPoint.h
index 8034de5abbbd8b6c25f60685c14719c6745b3d2e..d5837b57321d2c9c66607daeb84060e4f101d7f6 100644
--- a/Source/core/animation/animatable/AnimatableLengthPoint.h
+++ b/Source/core/animation/animatable/AnimatableLengthPoint.h
@@ -38,20 +38,20 @@ namespace blink {
 class AnimatableLengthPoint final : public AnimatableValue {
 public:
     ~AnimatableLengthPoint() override { }
-    static PassRefPtrWillBeRawPtr<AnimatableLengthPoint> create(PassRefPtrWillBeRawPtr<AnimatableValue> x, PassRefPtrWillBeRawPtr<AnimatableValue> y)
+    static AnimatableLengthPoint* create(AnimatableValue* x, AnimatableValue* y)
     {
-        return adoptRefWillBeNoop(new AnimatableLengthPoint(x, y));
+        return new AnimatableLengthPoint(x, y);
     }
-    const AnimatableValue* x() const { return m_x.get(); }
-    const AnimatableValue* y() const { return m_y.get(); }
+    const AnimatableValue* x() const { return m_x; }
+    const AnimatableValue* y() const { return m_y; }
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
-    PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const override;
+    AnimatableValue* interpolateTo(const AnimatableValue*, double fraction) const override;
 
 private:
-    AnimatableLengthPoint(PassRefPtrWillBeRawPtr<AnimatableValue> x, PassRefPtrWillBeRawPtr<AnimatableValue> y)
+    AnimatableLengthPoint(AnimatableValue* x, AnimatableValue* y)
         : m_x(x)
         , m_y(y)
     {
@@ -59,8 +59,8 @@ private:
     AnimatableType type() const override { return TypeLengthPoint; }
     bool equalTo(const AnimatableValue*) const override;
 
-    RefPtrWillBeMember<AnimatableValue> m_x;
-    RefPtrWillBeMember<AnimatableValue> m_y;
+    Member<AnimatableValue> m_x;
+    Member<AnimatableValue> m_y;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableLengthPoint, isLengthPoint());