Add type casts for KeyframeEffectReadOnly

third_party/WebKit/Source/core/animation/AnimationEffectReadOnly.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 61 matching lines @@
   class EventDelegate : public GarbageCollectedFinalized<EventDelegate> {
    public:
     virtual ~EventDelegate() {}
     virtual bool requiresIterationEvents(const AnimationEffectReadOnly&) = 0;
     virtual void onEventCondition(const AnimationEffectReadOnly&) = 0;
     DEFINE_INLINE_VIRTUAL_TRACE() {}
   };
 
   virtual ~AnimationEffectReadOnly() {}
 
+  virtual bool isKeyframeEffectReadOnly() const { return false; }
   virtual bool isKeyframeEffect() const { return false; }
   virtual bool isInertEffect() const { return false; }
 
   Phase getPhase() const { return ensureCalculated().phase; }
   bool isCurrent() const { return ensureCalculated().isCurrent; }
   bool isInEffect() const { return ensureCalculated().isInEffect; }
   bool isInPlay() const { return ensureCalculated().isInPlay; }
   double currentIteration() const {
     return ensureCalculated().currentIteration;
   }
@@ skipping 72 matching lines @@
   mutable bool m_needsUpdate;
   mutable double m_lastUpdateTime;
   String m_name;
 
   const CalculatedTiming& ensureCalculated() const;
 };
 
 }  // namespace blink
 
 #endif  // AnimationEffectReadOnly_h