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

Source/core/animation/animatable/AnimatableStrokeDasharrayList.h

Index: Source/core/animation/animatable/AnimatableStrokeDasharrayList.h
diff --git a/Source/core/animation/animatable/AnimatableStrokeDasharrayList.h b/Source/core/animation/animatable/AnimatableStrokeDasharrayList.h
index bb9329d92f5bcc25ae8201450d54d1aaaf9d3e3b..73bea3be37d3bd86b1dd4248cba157002186c2ed 100644
--- a/Source/core/animation/animatable/AnimatableStrokeDasharrayList.h
+++ b/Source/core/animation/animatable/AnimatableStrokeDasharrayList.h
@@ -41,9 +41,9 @@ class CORE_EXPORT AnimatableStrokeDasharrayList final : public AnimatableRepeata
 public:
     virtual ~AnimatableStrokeDasharrayList() { }
 
-    static PassRefPtrWillBeRawPtr<AnimatableStrokeDasharrayList> create(PassRefPtr<SVGDashArray> lengths, float zoom)
+    static AnimatableStrokeDasharrayList* create(PassRefPtr<SVGDashArray> lengths, float zoom)
     {
-        return adoptRefWillBeNoop(new AnimatableStrokeDasharrayList(lengths, zoom));
+        return new AnimatableStrokeDasharrayList(lengths, zoom);
     }
 
     PassRefPtr<SVGDashArray> toSVGDashArray(float zoom) const;
@@ -51,13 +51,13 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
 protected:
-    virtual PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const override;
+    virtual AnimatableValue* interpolateTo(const AnimatableValue*, double fraction) const override;
     virtual bool usesDefaultInterpolationWith(const AnimatableValue*) const override;
 
 private:
     AnimatableStrokeDasharrayList(PassRefPtr<SVGDashArray>, float zoom);
     // This will consume the vector passed into it.
-    AnimatableStrokeDasharrayList(WillBeHeapVector<RefPtrWillBeMember<AnimatableValue>>& values)
+    AnimatableStrokeDasharrayList(HeapVector<Member<AnimatableValue>>& values)
         : AnimatableRepeatable(values)
     {
     }