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

Source/core/animation/animatable/AnimatableLengthBox.h

Index: Source/core/animation/animatable/AnimatableLengthBox.h
diff --git a/Source/core/animation/animatable/AnimatableLengthBox.h b/Source/core/animation/animatable/AnimatableLengthBox.h
index 3968111a80c03d7c311eaee990c85f363965b984..068b27f580deb233a5aa726524a22f3c7cbb93e3 100644
--- a/Source/core/animation/animatable/AnimatableLengthBox.h
+++ b/Source/core/animation/animatable/AnimatableLengthBox.h
@@ -38,22 +38,22 @@ namespace blink {
 class AnimatableLengthBox final : public AnimatableValue {
 public:
     ~AnimatableLengthBox() override { }
-    static PassRefPtrWillBeRawPtr<AnimatableLengthBox> create(PassRefPtrWillBeRawPtr<AnimatableValue> left, PassRefPtrWillBeRawPtr<AnimatableValue> right, PassRefPtrWillBeRawPtr<AnimatableValue> top, PassRefPtrWillBeRawPtr<AnimatableValue> bottom)
+    static AnimatableLengthBox* create(AnimatableValue* left, AnimatableValue* right, AnimatableValue* top, AnimatableValue* bottom)
     {
-        return adoptRefWillBeNoop(new AnimatableLengthBox(left, right, top, bottom));
+        return new AnimatableLengthBox(left, right, top, bottom);
     }
-    const AnimatableValue* left() const { return m_left.get(); }
-    const AnimatableValue* right() const { return m_right.get(); }
-    const AnimatableValue* top() const { return m_top.get(); }
-    const AnimatableValue* bottom() const { return m_bottom.get(); }
+    const AnimatableValue* left() const { return m_left; }
+    const AnimatableValue* right() const { return m_right; }
+    const AnimatableValue* top() const { return m_top; }
+    const AnimatableValue* bottom() const { return m_bottom; }
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
-    PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const override;
+    AnimatableValue* interpolateTo(const AnimatableValue*, double fraction) const override;
 
 private:
-    AnimatableLengthBox(PassRefPtrWillBeRawPtr<AnimatableValue> left, PassRefPtrWillBeRawPtr<AnimatableValue> right, PassRefPtrWillBeRawPtr<AnimatableValue> top, PassRefPtrWillBeRawPtr<AnimatableValue> bottom)
+    AnimatableLengthBox(AnimatableValue* left, AnimatableValue* right, AnimatableValue* top, AnimatableValue* bottom)
         : m_left(left)
         , m_right(right)
         , m_top(top)
@@ -63,10 +63,10 @@ private:
     AnimatableType type() const override { return TypeLengthBox; }
     bool equalTo(const AnimatableValue*) const override;
 
-    RefPtrWillBeMember<AnimatableValue> m_left;
-    RefPtrWillBeMember<AnimatableValue> m_right;
-    RefPtrWillBeMember<AnimatableValue> m_top;
-    RefPtrWillBeMember<AnimatableValue> m_bottom;
+    Member<AnimatableValue> m_left;
+    Member<AnimatableValue> m_right;
+    Member<AnimatableValue> m_top;
+    Member<AnimatableValue> m_bottom;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableLengthBox, isLengthBox());