Prepare for responsive CSS animations.

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/Keyframe.h"
 #include "core/css/StylePropertySet.h"
 
 namespace blink {
 
 class StyleSheetContents;
 
 class StringKeyframe : public Keyframe {
 public:
     static PassRefPtrWillBeRawPtr<StringKeyframe> create()
     {
         return adoptRefWillBeNoop(new StringKeyframe);
     }
     void setPropertyValue(CSSPropertyID, const String& value, StyleSheetContents*);
+    void setPropertyValue(CSSPropertyID, PassRefPtr<CSSValue>);
+    void setPropertyAnimatableValue(CSSPropertyID, PassRefPtr<AnimatableValue>);
     void clearPropertyValue(CSSPropertyID property) { m_propertySet->removeProperty(property); }
     CSSValue* propertyValue(CSSPropertyID property) const
     {
         int index = m_propertySet->findPropertyIndex(property);
         RELEASE_ASSERT(index >= 0);
         return m_propertySet->propertyAt(static_cast<unsigned>(index)).value();
     }
     virtual PropertySet properties() const override;
     RefPtrWillBeMember<MutableStylePropertySet> propertySetForInspector() const { return m_propertySet; }
 
     virtual void trace(Visitor*) override;
 
     class PropertySpecificKeyframe : public Keyframe::PropertySpecificKeyframe {
     public:
-        PropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, CSSValue*, AnimationEffect::CompositeOperation);
+        PropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, CSSValue*, AnimationEffect::CompositeOperation, PassRefPtr<AnimatableValue> = nullptr);
 
         CSSValue* value() const { return m_value.get(); }
         virtual const PassRefPtrWillBeRawPtr<AnimatableValue> getAnimatableValue() const override final { return m_animatableValueCache.get(); }
 
         virtual PassOwnPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const override final;
         virtual PassRefPtrWillBeRawPtr<Interpolation> createInterpolation(CSSPropertyID, blink::Keyframe::PropertySpecificKeyframe* end, Element*) const override final;
 
         virtual void trace(Visitor*) override;
 
     private:
@@ skipping 12 matching lines @@
     { }
 
     StringKeyframe(const StringKeyframe& copyFrom);
 
     virtual PassRefPtrWillBeRawPtr<Keyframe> clone() const override;
     virtual PassOwnPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> createPropertySpecificKeyframe(CSSPropertyID) const override;
 
     virtual bool isStringKeyframe() const override { return true; }
 
     RefPtrWillBeMember<MutableStylePropertySet> m_propertySet;
+    WillBeHeapHashMap<CSSPropertyID, RefPtrWillBeMember<AnimatableValue>> m_cachedAnimatableValues;
 };
 
 using StringPropertySpecificKeyframe = StringKeyframe::PropertySpecificKeyframe;
 
 DEFINE_TYPE_CASTS(StringKeyframe, Keyframe, value, value->isStringKeyframe(), value.isStringKeyframe());
 DEFINE_TYPE_CASTS(StringPropertySpecificKeyframe, Keyframe::PropertySpecificKeyframe, value, value->isStringPropertySpecificKeyframe(), value.isStringPropertySpecificKeyframe());
 
 }
 
 #endif