Revert "Web Animations: Introduce String based KeyframeEffectModel"

Source/core/animation/StringKeyframe.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 StringKeyframe_h
-#define StringKeyframe_h
-
-#include "core/animation/AnimatableValue.h"
-#include "core/animation/Keyframe.h"
-
-namespace WebCore {
-
-class StringKeyframe : public Keyframe {
-public:
-    static PassRefPtr<StringKeyframe> create() { return adoptRef(new StringKeyframe); }
-    void setPropertyValue(CSSPropertyID property, const String& value)
-    {
-        m_propertyValues.add(property, value);
-    }
-    void clearPropertyValue(CSSPropertyID property) { m_propertyValues.remove(property); }
-    String propertyValue(CSSPropertyID property) const
-    {
-        ASSERT(m_propertyValues.contains(property));
-        return m_propertyValues.get(property);
-    }
-    virtual PropertySet properties() const OVERRIDE;
-
-    class PropertySpecificKeyframe : public Keyframe::PropertySpecificKeyframe {
-    public:
-        PropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, const String& value, AnimationEffect::CompositeOperation);
-
-        const String& value() const { return m_value; }
-
-        virtual PassOwnPtr<Keyframe::PropertySpecificKeyframe> neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const OVERRIDE FINAL;
-        virtual PassRefPtr<Interpolation> createInterpolation(CSSPropertyID, WebCore::Keyframe::PropertySpecificKeyframe* end) const OVERRIDE FINAL;
-    private:
-        PropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, const String& value);
-
-        virtual PassOwnPtr<Keyframe::PropertySpecificKeyframe> cloneWithOffset(double offset) const;
-        virtual bool isStringPropertySpecificKeyframe() const OVERRIDE { return true; }
-
-        String m_value;
-    };
-
-private:
-    StringKeyframe() { }
-
-    StringKeyframe(const StringKeyframe& copyFrom);
-
-    virtual PassRefPtrWillBeRawPtr<Keyframe> clone() const OVERRIDE;
-    virtual PassOwnPtr<Keyframe::PropertySpecificKeyframe> createPropertySpecificKeyframe(CSSPropertyID) const OVERRIDE;
-
-    virtual bool isStringKeyframe() const OVERRIDE { return true; }
-
-    typedef HashMap<CSSPropertyID, String> PropertyValueMap;
-    PropertyValueMap m_propertyValues;
-};
-
-typedef StringKeyframe::PropertySpecificKeyframe StringPropertySpecificKeyframe;
-
-}
-
-#endif