Prepare for responsive CSS animations.

Source/core/animation/KeyframeEffectModel.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 91 matching lines @@
     virtual void trace(Visitor*) override;
 
     // FIXME: This is a hack used to resolve CSSValues to AnimatableValues while we have a valid handle on an element.
     // This should be removed once StringKeyframes no longer uses InterpolableAnimatableValues.
     void forceConversionsToAnimatableValues(Element* element)
     {
         ensureKeyframeGroups();
         ensureInterpolationEffect(element);
     }
 
+    void setDeferredInterpolationsOutdated(bool outdated)
+    {
+        m_interpolationEffect->setDeferredInterpolationsOutdated(outdated);
+    }
+
     static KeyframeVector normalizedKeyframesForInspector(const KeyframeVector& keyframes) { return normalizedKeyframes(keyframes); }
 
 protected:
     static KeyframeVector normalizedKeyframes(const KeyframeVector& keyframes);
 
     // Lazily computes the groups of property-specific keyframes.
     void ensureKeyframeGroups() const;
     void ensureInterpolationEffect(Element* = nullptr) const;
 
     KeyframeVector m_keyframes;
@@ skipping 49 matching lines @@
 inline const AnimatableValueKeyframeEffectModel* toAnimatableValueKeyframeEffectModel(const AnimationEffect* base)
 {
     return toAnimatableValueKeyframeEffectModel(toKeyframeEffectModelBase(base));
 }
 
 inline AnimatableValueKeyframeEffectModel* toAnimatableValueKeyframeEffectModel(AnimationEffect* base)
 {
     return toAnimatableValueKeyframeEffectModel(toKeyframeEffectModelBase(base));
 }
 
+inline const StringKeyframeEffectModel* toStringKeyframeEffectModel(const AnimationEffect* base)
+{
+    return toStringKeyframeEffectModel(toKeyframeEffectModelBase(base));
+}
+
+inline StringKeyframeEffectModel* toStringKeyframeEffectModel(AnimationEffect* base)
+{
+    return toStringKeyframeEffectModel(toKeyframeEffectModelBase(base));
+}
+
 template <>
 inline bool KeyframeEffectModel<AnimatableValueKeyframe>::isAnimatableValueKeyframeEffectModel() const { return true; }
 
 template <>
 inline bool KeyframeEffectModel<StringKeyframe>::isStringKeyframeEffectModel() const { return true; }
 
 } // namespace blink
 
 #endif // KeyframeEffectModel_h