Update a result vector when sampling animation effects.

Source/core/animation/InertAnimation.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 22 matching lines @@
 
 #include "core/animation/AnimationEffect.h"
 #include "core/animation/AnimationNode.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class InertAnimation final : public AnimationNode {
 public:
     static PassRefPtrWillBeRawPtr<InertAnimation> create(PassRefPtrWillBeRawPtr<AnimationEffect>, const Timing&, bool paused);
-    PassOwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation> > > sample(double inheritedTime);
+    void sample(double inheritedTime, OwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>>&);
     AnimationEffect* effect() const { return m_effect.get(); }
     bool paused() const { return m_paused; }
 
     virtual void trace(Visitor*);
 
 protected:
     virtual void updateChildrenAndEffects() const override { }
     virtual double calculateTimeToEffectChange(bool forwards, double inheritedTime, double timeToNextIteration) const override;
 
 private:
     InertAnimation(PassRefPtrWillBeRawPtr<AnimationEffect>, const Timing&, bool paused);
     RefPtrWillBeMember<AnimationEffect> m_effect;
     bool m_paused;
 };
 
 } // namespace blink
 
 #endif