Introduce KeyframeEffectReadOnly interface

third_party/WebKit/Source/core/animation/SampledEffect.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 SampledEffect_h
 #define SampledEffect_h
 
 #include "core/animation/Animation.h"
 #include "core/animation/Interpolation.h"
 #include "core/animation/KeyframeEffect.h"
+#include "core/animation/KeyframeEffectReadOnly.h"
 #include "wtf/Allocator.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class SVGElement;
 
 // Associates the results of sampling an EffectModel with metadata used for effect ordering and managing composited animations.
 class SampledEffect : public GarbageCollectedFinalized<SampledEffect> {
     WTF_MAKE_NONCOPYABLE(SampledEffect);
 public:
     static SampledEffect* create(KeyframeEffect* animation)
     {
         return new SampledEffect(animation);
     }
 
     void clear();
 
     const Vector<RefPtr<Interpolation>>& interpolations() const { return m_interpolations; }
     Vector<RefPtr<Interpolation>>& mutableInterpolations() { return m_interpolations; }
 
     KeyframeEffect* effect() const { return m_effect; }
     unsigned sequenceNumber() const { return m_sequenceNumber; }
-    KeyframeEffect::Priority priority() const { return m_priority; }
+    KeyframeEffectReadOnly::Priority priority() const { return m_priority; }
     bool willNeverChange() const;
     void removeReplacedInterpolations(const HashSet<PropertyHandle>&);
     void updateReplacedProperties(HashSet<PropertyHandle>&);
 
     DECLARE_TRACE();
 
 private:
     SampledEffect(KeyframeEffect*);
 
     WeakMember<KeyframeEffect> m_effect;
     Vector<RefPtr<Interpolation>> m_interpolations;
     const unsigned m_sequenceNumber;
-    KeyframeEffect::Priority m_priority;
+    KeyframeEffectReadOnly::Priority m_priority;
 };
 
 } // namespace blink
 
 #endif // SampledEffect_h