Introduce KeyframeEffectReadOnly interface

third_party/WebKit/Source/core/animation/KeyframeEffectReadOnly.h

+/*
+ * Copyright (C) 2016 Google Inc. All rights reserved.
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+ */
+
+#ifndef KeyframeEffectReadOnly_h
+#define KeyframeEffectReadOnly_h
+
+#include "core/CoreExport.h"
+#include "core/animation/AnimationEffectReadOnly.h"
+#include "core/animation/EffectModel.h"
+
+namespace blink {
+
+class KeyframeEffectOptions;
+class DictionarySequenceOrDictionary;
+class Element;
+class ExceptionState;
+class ExecutionContext;
+class SampledEffect;
+
+// Represents the effect of an Animation on an Element's properties.
+// http://w3c.github.io/web-animations/#the-keyframeeffect-interfaces
+class CORE_EXPORT KeyframeEffectReadOnly : public AnimationEffectReadOnly {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    enum Priority { DefaultPriority, TransitionPriority };

[alancutter (OOO until 2018), 2016/09/27 05:09:05]

Leave Priority in KeyframeEffect since it's not necessary for the
KeyframeEffectReadOnly interface. This also saves unnecessary churn elsewhere in
the code.

[suzyh_UTC10 (ex-contributor), 2016/09/27 07:21:59]

Done.

+
+    static KeyframeEffectReadOnly* create(ExecutionContext*, Element*, const DictionarySequenceOrDictionary& effectInput, double duration, ExceptionState&);
+    static KeyframeEffectReadOnly* create(ExecutionContext*, Element*, const DictionarySequenceOrDictionary& effectInput, const KeyframeEffectOptions& timingInput, ExceptionState&);
+    static KeyframeEffectReadOnly* create(ExecutionContext*, Element*, const DictionarySequenceOrDictionary& effectInput, ExceptionState&);
+
+    ~KeyframeEffectReadOnly() override;
+
+    DECLARE_VIRTUAL_TRACE();
+
+protected:
+    KeyframeEffectReadOnly(Element*, EffectModel*, const Timing&, Priority, EventDelegate*);
+
+    Member<Element> m_target;
+    Member<EffectModel> m_model;
+    Member<SampledEffect> m_sampledEffect;
+
+    Priority m_priority;
+};
+
+} // namespace blink
+
+#endif // KeyframeEffectReadOnly_h