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

Source/core/animation/animatable/AnimatableDoubleAndBool.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef AnimatableDoubleAndBool_h
 #define AnimatableDoubleAndBool_h
 
 #include "core/CoreExport.h"
 #include "core/animation/animatable/AnimatableValue.h"
 
 namespace blink {
 
 class CORE_EXPORT AnimatableDoubleAndBool final : public AnimatableValue {
 public:
     ~AnimatableDoubleAndBool() override { }
-    static PassRefPtrWillBeRawPtr<AnimatableDoubleAndBool> create(double number, bool flag)
+    static AnimatableDoubleAndBool* create(double number, bool flag)
     {
-        return adoptRefWillBeNoop(new AnimatableDoubleAndBool(number, flag));
+        return new AnimatableDoubleAndBool(number, flag);
     }
 
     double toDouble() const { return m_number; }
     bool flag() const { return m_flag; }
 
     DEFINE_INLINE_VIRTUAL_TRACE() { AnimatableValue::trace(visitor); }
 
 protected:
-    PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const override;
+    AnimatableValue* interpolateTo(const AnimatableValue*, double fraction) const override;
     bool usesDefaultInterpolationWith(const AnimatableValue*) const override;
 
 private:
     AnimatableDoubleAndBool(double number, bool flag)
         : m_number(number)
         , m_flag(flag)
     {
     }
     AnimatableType type() const override { return TypeDoubleAndBool; }
     bool equalTo(const AnimatableValue*) const override;
 
     double m_number;
     bool m_flag;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableDoubleAndBool, isDoubleAndBool());
 
 } // namespace blink
 
 #endif // AnimatableDoubleAndBool_h