Web Animations: Update naming to reflect spec changes

Source/core/animation/StringKeyframe.h

Index: Source/core/animation/StringKeyframe.h
diff --git a/Source/core/animation/StringKeyframe.h b/Source/core/animation/StringKeyframe.h
index 58aa569ab8a3303623413502e33be627b218e68d..839fe75da8166b60e590fee3985754a2b18195b9 100644
--- a/Source/core/animation/StringKeyframe.h
+++ b/Source/core/animation/StringKeyframe.h
@@ -41,7 +41,7 @@ public:
 
     class CSSPropertySpecificKeyframe : public Keyframe::PropertySpecificKeyframe {
     public:
-        CSSPropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, CSSValue*, AnimationEffect::CompositeOperation);
+        CSSPropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, CSSValue*, EffectModel::CompositeOperation);
 
         CSSValue* value() const { return m_value.get(); }
 
@@ -70,7 +70,7 @@ public:
 
     class SVGPropertySpecificKeyframe : public Keyframe::PropertySpecificKeyframe {
     public:
-        SVGPropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, const String&, AnimationEffect::CompositeOperation);
+        SVGPropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, const String&, EffectModel::CompositeOperation);
 
         const String& value() const { return m_value; }