Web Animations CSS: Support Animation of StyleImage and LengthBox

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 54 matching lines @@
             m_styles = MutableStylePropertySet::create();
         m_styles->mergeAndOverrideOnConflict(styles);
     }
 private:
     HashSet<const Player*> m_filtered;
     RefPtr<MutableStylePropertySet> m_styles;
 };
 
 class CSSAnimations FINAL {
 public:
+    static bool isAnimatableProperty(CSSPropertyID);
     static bool needsUpdate(const Element*, const RenderStyle*);
     static PassOwnPtr<CSSAnimationUpdate> calculateUpdate(const Element*, EDisplay, const CSSAnimations*, const CSSAnimationDataList*, StyleResolver*);
     void update(Element*, const RenderStyle*);
     bool isEmpty() const { return m_animations.isEmpty(); }
     void cancel();
 private:
     typedef HashMap<StringImpl*, RefPtr<Player> > AnimationMap;
     AnimationMap m_animations;
     class EventDelegate FINAL : public TimedItemEventDelegate {
     public:
         EventDelegate(Element* target, const AtomicString& name)
             : m_target(target)
             , m_name(name)
         {
         }
         virtual void onEventCondition(bool wasInPlay, bool isInPlay, double previousIteration, double currentIteration) OVERRIDE;
     private:
         void maybeDispatch(Document::ListenerType, AtomicString& eventName, double elapsedTime);
         Element* m_target;
         const AtomicString m_name;
     };
 };
 
 } // namespace WebCore
 
 #endif