Add foundation for removing AnimatableValues from StyleInterpolation

Source/core/animation/StringKeyframe.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 StringKeyframe_h
 #define StringKeyframe_h
 
 #include "core/animation/Keyframe.h"
 #include "core/css/StylePropertySet.h"
 
@@ skipping 31 matching lines @@
     class CSSPropertySpecificKeyframe : public Keyframe::PropertySpecificKeyframe {
     public:
         CSSPropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, CSSValue*, EffectModel::CompositeOperation);
 
         CSSValue* value() const { return m_value.get(); }
 
         virtual void populateAnimatableValue(CSSPropertyID, Element&, const ComputedStyle* baseStyle) const;
         virtual const PassRefPtrWillBeRawPtr<AnimatableValue> getAnimatableValue() const override final { return m_animatableValueCache.get(); }
         void setAnimatableValue(PassRefPtrWillBeRawPtr<AnimatableValue> value) { m_animatableValueCache = value; }
 
-        virtual PassOwnPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const override final;
-        virtual PassRefPtrWillBeRawPtr<Interpolation> maybeCreateInterpolation(PropertyHandle, Keyframe::PropertySpecificKeyframe& end, Element*, const ComputedStyle* baseStyle) const override final;
+        virtual PassRefPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const override final;
+        virtual PassRefPtrWillBeRawPtr<Interpolation> maybeCreateInterpolation(PropertyHandle, Keyframe::PropertySpecificKeyframe& end, Element*, const ComputedStyle* baseStyle) override final;
 
         DECLARE_VIRTUAL_TRACE();
 
     private:
         CSSPropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, CSSValue*);
 
-        virtual PassOwnPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> cloneWithOffset(double offset) const;
+        virtual PassRefPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> cloneWithOffset(double offset) const;
         virtual bool isCSSPropertySpecificKeyframe() const override { return true; }
 
         static bool createInterpolationsFromCSSValues(CSSPropertyID, CSSValue* fromCSSValue, CSSValue* toCSSValue, Element*, OwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>>& interpolations);
 
         void populateAnimatableValueCaches(CSSPropertyID, Keyframe::PropertySpecificKeyframe&, Element*, CSSValue& fromCSSValue, CSSValue& toCSSValue) const;
 
         RefPtrWillBeMember<CSSValue> m_value;
         mutable RefPtrWillBeMember<AnimatableValue> m_animatableValueCache;
     };
 
     class SVGPropertySpecificKeyframe : public Keyframe::PropertySpecificKeyframe {
     public:
         SVGPropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, const String&, EffectModel::CompositeOperation);
 
         const String& value() const { return m_value; }
 
-        virtual PassOwnPtrWillBeRawPtr<PropertySpecificKeyframe> cloneWithOffset(double offset) const override final;
+        virtual PassRefPtrWillBeRawPtr<PropertySpecificKeyframe> cloneWithOffset(double offset) const override final;
 
         virtual const PassRefPtrWillBeRawPtr<AnimatableValue> getAnimatableValue() const override final { return nullptr; }
 
-        virtual PassOwnPtrWillBeRawPtr<PropertySpecificKeyframe> neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const override final;
-        virtual PassRefPtrWillBeRawPtr<Interpolation> maybeCreateInterpolation(PropertyHandle, Keyframe::PropertySpecificKeyframe& end, Element*, const ComputedStyle* baseStyle) const override final;
+        virtual PassRefPtrWillBeRawPtr<PropertySpecificKeyframe> neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const override final;
+        virtual PassRefPtrWillBeRawPtr<Interpolation> maybeCreateInterpolation(PropertyHandle, Keyframe::PropertySpecificKeyframe& end, Element*, const ComputedStyle* baseStyle) override final;
 
         DECLARE_VIRTUAL_TRACE();
 
     private:
         SVGPropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, const String&);
 
         virtual bool isSVGPropertySpecificKeyframe() const override { return true; }
 
         String m_value;
     };
 
 private:
     StringKeyframe()
         : m_propertySet(MutableStylePropertySet::create())
     { }
 
     StringKeyframe(const StringKeyframe& copyFrom);
 
     virtual PassRefPtrWillBeRawPtr<Keyframe> clone() const override;
-    virtual PassOwnPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> createPropertySpecificKeyframe(PropertyHandle) const override;
+    virtual PassRefPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> createPropertySpecificKeyframe(PropertyHandle) const override;
 
     virtual bool isStringKeyframe() const override { return true; }
 
     RefPtrWillBeMember<MutableStylePropertySet> m_propertySet;
     HashMap<const QualifiedName*, String> m_svgPropertyMap;
 };
 
 using CSSPropertySpecificKeyframe = StringKeyframe::CSSPropertySpecificKeyframe;
 using SVGPropertySpecificKeyframe = StringKeyframe::SVGPropertySpecificKeyframe;
 
 DEFINE_TYPE_CASTS(StringKeyframe, Keyframe, value, value->isStringKeyframe(), value.isStringKeyframe());
 DEFINE_TYPE_CASTS(CSSPropertySpecificKeyframe, Keyframe::PropertySpecificKeyframe, value, value->isCSSPropertySpecificKeyframe(), value.isCSSPropertySpecificKeyframe());
 DEFINE_TYPE_CASTS(SVGPropertySpecificKeyframe, Keyframe::PropertySpecificKeyframe, value, value->isSVGPropertySpecificKeyframe(), value.isSVGPropertySpecificKeyframe());
 
 }
 
 #endif