Refactor CSS Transitions to use CSSInterpolationTypes instead of AnimatableValues

third_party/WebKit/Source/core/animation/css/CSSAnimations.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 121 matching lines @@
     unsigned styleRuleVersion;
   };
 
   struct RunningTransition {
     DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
 
    public:
     DEFINE_INLINE_TRACE() { visitor->trace(animation); }
 
     Member<Animation> animation;
-    const AnimatableValue* from;
-    const AnimatableValue* to;
+    RefPtr<AnimatableValue> from;
+    RefPtr<AnimatableValue> to;
     RefPtr<AnimatableValue> reversingAdjustedStartValue;
     double reversingShorteningFactor;
   };
 
   HeapVector<Member<RunningAnimation>> m_runningAnimations;
 
   using TransitionMap = HeapHashMap<CSSPropertyID, RunningTransition>;
   TransitionMap m_transitions;
 
   CSSAnimationUpdate m_pendingUpdate;
@@ skipping 64 matching lines @@
 
     Member<Element> m_transitionTarget;
     const CSSPropertyID m_property;
     AnimationEffectReadOnly::Phase m_previousPhase;
   };
 };
 
 }  // namespace blink
 
 #endif