Rework SMIL animation target invalidation

third_party/WebKit/Source/core/svg/animation/SVGSMILElement.h

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 119 matching lines @@
  protected:
   enum BeginOrEnd { Begin, End };
 
   void addInstanceTime(
       BeginOrEnd,
       SMILTime,
       SMILTimeWithOrigin::Origin = SMILTimeWithOrigin::ParserOrigin);
 
   void setInactive() { m_activeState = Inactive; }
 
+  void setTargetElement(SVGElement*);
+
   // Sub-classes may need to take action when the target is changed.
-  virtual void setTargetElement(SVGElement*);
-
-  void schedule();
-  void unscheduleIfScheduled();
+  virtual void willChangeAnimationTarget();
+  virtual void didChangeAnimationTarget();
 
   QualifiedName m_attributeName;
 
  private:
   void buildPendingResource() override;
   void clearResourceAndEventBaseReferences();
   void clearConditions();
 
   virtual void startedActiveInterval() = 0;
   void endedActiveInterval();
@@ skipping 140 matching lines @@
          element.hasTagName(SVGNames::animateMotionTag) ||
          element.hasTagName(SVGNames::animateTransformTag) ||
          element.hasTagName((SVGNames::discardTag));
 }
 
 DEFINE_SVGELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGSMILElement);
 
 }  // namespace blink
 
 #endif  // SVGSMILElement_h