Web Animations: Add a name to AnimationNode and trace running players

Source/core/animation/AnimationNode.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 95 matching lines @@
     const AnimationPlayer* player() const { return m_player; }
     AnimationPlayer* player() { return m_player; }
     const Timing& specifiedTiming() const { return m_timing; }
     PassRefPtrWillBeRawPtr<AnimationNodeTiming> timing();
     void updateSpecifiedTiming(const Timing&);
 
     // This method returns time in ms as it is unused except via the API.
     double localTime(bool& isNull) const { isNull = !m_player; return ensureCalculated().localTime * 1000; }
     double currentIteration(bool& isNull) const { isNull = !ensureCalculated().isInEffect; return ensureCalculated().currentIteration; }
 
+    void setName(const String& name) { m_name = name; }
+    const String& name() const { return m_name; }
+
     virtual void trace(Visitor*);
 
 protected:
     explicit AnimationNode(const Timing&, PassOwnPtrWillBeRawPtr<EventDelegate> = nullptr);
 
     // When AnimationNode receives a new inherited time via updateInheritedTime
     // it will (if necessary) recalculate timings and (if necessary) call
     // updateChildrenAndEffects.
     void updateInheritedTime(double inheritedTime, TimingUpdateReason) const;
     void invalidate() const { m_needsUpdate = true; };
@@ skipping 31 matching lines @@
         double timeFraction;
         bool isCurrent;
         bool isInEffect;
         bool isInPlay;
         double localTime;
         double timeToForwardsEffectChange;
         double timeToReverseEffectChange;
     } m_calculated;
     mutable bool m_needsUpdate;
     mutable double m_lastUpdateTime;
+    String m_name;
 
     const CalculatedTiming& ensureCalculated() const;
 };
 
 } // namespace blink
 
 #endif