Implement AnimationEffectTimingReadOnly interface

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 22 matching lines @@
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "core/animation/Timing.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class Animation;
 class AnimationEffectReadOnly;
-class AnimationEffectTiming;
+class AnimationEffectTimingReadOnly;
 class ComputedTimingProperties;
 
 enum TimingUpdateReason {
     TimingUpdateOnDemand,
     TimingUpdateForAnimationFrame
 };
 
 static inline bool isNull(double value)
 {
     return std::isnan(value);
@@ skipping 40 matching lines @@
     double timeToForwardsEffectChange() const { return ensureCalculated().timeToForwardsEffectChange; }
     double timeToReverseEffectChange() const { return ensureCalculated().timeToReverseEffectChange; }
 
     double iterationDuration() const;
     double activeDurationInternal() const;
     double endTimeInternal() const { return specifiedTiming().startDelay + activeDurationInternal() + specifiedTiming().endDelay; }
 
     const Animation* animation() const { return m_animation; }
     Animation* animation() { return m_animation; }
     const Timing& specifiedTiming() const { return m_timing; }
-    AnimationEffectTiming* timing();
+    virtual AnimationEffectTimingReadOnly* timing();
     void updateSpecifiedTiming(const Timing&);
 
     void getComputedTiming(ComputedTimingProperties&);
     ComputedTimingProperties getComputedTiming();
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     explicit AnimationEffectReadOnly(const Timing&, EventDelegate* = nullptr);
 
@@ skipping 42 matching lines @@
     mutable bool m_needsUpdate;
     mutable double m_lastUpdateTime;
     String m_name;
 
     const CalculatedTiming& ensureCalculated() const;
 };
 
 } // namespace blink
 
 #endif // AnimationEffectReadOnly_h