Defer compositor keyframe snapshots until the next style resolve

third_party/WebKit/Source/core/animation/InertEffect.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 29 matching lines @@
 
 // Lightweight subset of KeyframeEffect.
 // Used to transport data for deferred KeyframeEffect construction and one off Interpolation sampling.
 class CORE_EXPORT InertEffect final : public AnimationEffect {
 public:
     static InertEffect* create(EffectModel*, const Timing&, bool paused, double inheritedTime);
     void sample(Vector<RefPtr<Interpolation>>&) const;
     EffectModel* model() const { return m_model.get(); }
     bool paused() const { return m_paused; }
 
+    bool isInertEffect() const final { return true; }
+
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     void updateChildrenAndEffects() const override { }
     double calculateTimeToEffectChange(bool forwards, double inheritedTime, double timeToNextIteration) const override;
 
 private:
     InertEffect(EffectModel*, const Timing&, bool paused, double inheritedTime);
     Member<EffectModel> m_model;
     bool m_paused;
     double m_inheritedTime;
 };
 
+DEFINE_TYPE_CASTS(InertEffect, AnimationEffect, animationEffect, animationEffect->isInertEffect(), animationEffect.isInertEffect());
+
 } // namespace blink
 
 #endif