Add foundation for removing AnimatableValues from StyleInterpolation

Source/core/animation/Keyframe.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 Keyframe_h
 #define Keyframe_h
 
 #include "core/CoreExport.h"
 #include "core/animation/AnimationEffect.h"
 #include "core/animation/EffectModel.h"
@@ skipping 34 matching lines @@
         RefPtrWillBeRawPtr<Keyframe> theClone = clone();
         theClone->setOffset(offset);
         return theClone.release();
     }
 
     virtual bool isAnimatableValueKeyframe() const { return false; }
     virtual bool isStringKeyframe() const { return false; }
 
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 
-    class PropertySpecificKeyframe : public NoBaseWillBeGarbageCollectedFinalized<PropertySpecificKeyframe> {
+    class PropertySpecificKeyframe : public RefCountedWillBeGarbageCollectedFinalized<PropertySpecificKeyframe> {
     public:
         virtual ~PropertySpecificKeyframe() { }
         double offset() const { return m_offset; }
         TimingFunction& easing() const { return *m_easing; }
         EffectModel::CompositeOperation composite() const { return m_composite; }
-        virtual PassOwnPtrWillBeRawPtr<PropertySpecificKeyframe> cloneWithOffset(double offset) const = 0;
+        virtual PassRefPtrWillBeRawPtr<PropertySpecificKeyframe> cloneWithOffset(double offset) const = 0;
 
         // FIXME: Remove this once CompositorAnimations no longer depends on AnimatableValues
         virtual void populateAnimatableValue(CSSPropertyID, Element&, const ComputedStyle* baseStyle) const { }
         virtual const PassRefPtrWillBeRawPtr<AnimatableValue> getAnimatableValue() const = 0;
 
         virtual bool isAnimatableValuePropertySpecificKeyframe() const { return false; }
         virtual bool isCSSPropertySpecificKeyframe() const { return false; }
         virtual bool isSVGPropertySpecificKeyframe() const { return false; }
 
-        virtual PassOwnPtrWillBeRawPtr<PropertySpecificKeyframe> neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const = 0;
-        virtual PassRefPtrWillBeRawPtr<Interpolation> maybeCreateInterpolation(PropertyHandle, Keyframe::PropertySpecificKeyframe& end, Element*, const ComputedStyle* baseStyle) const = 0;
+        virtual PassRefPtrWillBeRawPtr<PropertySpecificKeyframe> neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const = 0;
+        virtual PassRefPtrWillBeRawPtr<Interpolation> maybeCreateInterpolation(PropertyHandle, Keyframe::PropertySpecificKeyframe& end, Element*, const ComputedStyle* baseStyle) = 0;
 
         DEFINE_INLINE_VIRTUAL_TRACE() { }
 
     protected:
         PropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, EffectModel::CompositeOperation);
 
         double m_offset;
         RefPtr<TimingFunction> m_easing;
         EffectModel::CompositeOperation m_composite;
     };
 
-    virtual PassOwnPtrWillBeRawPtr<PropertySpecificKeyframe> createPropertySpecificKeyframe(PropertyHandle) const = 0;
+    virtual PassRefPtrWillBeRawPtr<PropertySpecificKeyframe> createPropertySpecificKeyframe(PropertyHandle) const = 0;
 
 protected:
     Keyframe()
         : m_offset(nullValue())
         , m_composite(EffectModel::CompositeReplace)
         , m_easing(LinearTimingFunction::shared())
     {
     }
     Keyframe(double offset, EffectModel::CompositeOperation composite, PassRefPtr<TimingFunction> easing)
         : m_offset(offset)
         , m_composite(composite)
         , m_easing(easing)
     {
     }
 
     double m_offset;
     EffectModel::CompositeOperation m_composite;
     RefPtr<TimingFunction> m_easing;
 };
 
 } // namespace blink
 
 #endif // Keyframe_h