[SVG] Remove existing event listeners when eventBase conditions are cleared

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 112 matching lines @@
 
     void setInactive() { m_activeState = Inactive; }
 
     // Sub-classes may need to take action when the target is changed.
     virtual void setTargetElement(SVGElement*);
     virtual void setAttributeName(const QualifiedName&);
 
 private:
     virtual void buildPendingResource() OVERRIDE;
     void clearResourceAndEventBaseReferences();
+    void clearConditions();
 
     virtual void startedActiveInterval() = 0;
     void endedActiveInterval();
     virtual void updateAnimation(float percent, unsigned repeat, SVGSMILElement* resultElement) = 0;
 
     virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE { return false; }
 
     enum BeginOrEnd {
         Begin,
         End
@@ skipping 100 matching lines @@
 {
     return node.hasTagName(SVGNames::setTag) || node.hasTagName(SVGNames::animateTag) || node.hasTagName(SVGNames::animateMotionTag)
         || node.hasTagName(SVGNames::animateTransformTag) || node.hasTagName((SVGNames::discardTag));
 }
 
 DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION(SVGSMILElement);
 
 }
 
 #endif // SVGSMILElement_h