Web Animations: Update naming to reflect spec changes

Source/core/animation/animatable/AnimatableValueKeyframe.h

Index: Source/core/animation/animatable/AnimatableValueKeyframe.h
diff --git a/Source/core/animation/animatable/AnimatableValueKeyframe.h b/Source/core/animation/animatable/AnimatableValueKeyframe.h
index 6e7d3308aa7e9c5f51e8416cd4cf843094508555..e1533dbea4d7be341a274e70a384009159d3b29a 100644
--- a/Source/core/animation/animatable/AnimatableValueKeyframe.h
+++ b/Source/core/animation/animatable/AnimatableValueKeyframe.h
@@ -33,7 +33,7 @@ public:
 
     class PropertySpecificKeyframe : public Keyframe::PropertySpecificKeyframe {
     public:
-        PropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, const AnimatableValue*, AnimationEffect::CompositeOperation);
+        PropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, const AnimatableValue*, EffectModel::CompositeOperation);
 
         AnimatableValue* value() const { return m_value.get(); }
         virtual const PassRefPtrWillBeRawPtr<AnimatableValue> getAnimatableValue() const override final { return m_value; }