Fix virtual/override/final usage in Source/core/svg/.

Source/core/svg/animation/SVGSMILElement.cpp

 /*
  * 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 34 matching lines @@
 
 namespace blink {
 
 class RepeatEvent final : public Event {
 public:
     static PassRefPtrWillBeRawPtr<RepeatEvent> create(const AtomicString& type, int repeat)
     {
         return adoptRefWillBeNoop(new RepeatEvent(type, false, false, repeat));
     }
 
-    virtual ~RepeatEvent() { }
+    ~RepeatEvent() override {}
 
     int repeat() const { return m_repeat; }
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         Event::trace(visitor);
     }
 
 protected:
     RepeatEvent(const AtomicString& type, bool canBubble, bool cancelable, int repeat = -1)
@@ skipping 46 matching lines @@
         return adoptRef(new ConditionEventListener(animation, condition));
     }
 
     static const ConditionEventListener* cast(const EventListener* listener)
     {
         return listener->type() == ConditionEventListenerType
             ? static_cast<const ConditionEventListener*>(listener)
             : nullptr;
     }
 
-    virtual bool operator==(const EventListener& other) override;
+    bool operator==(const EventListener& other) override;
 
     void disconnectAnimation()
     {
         m_animation = nullptr;
     }
 
 private:
     ConditionEventListener(SVGSMILElement* animation, SVGSMILElement::Condition* condition)
         : EventListener(ConditionEventListenerType)
         , m_animation(animation)
         , m_condition(condition)
     {
     }
 
-    virtual void handleEvent(ExecutionContext*, Event*) override;
+    void handleEvent(ExecutionContext*, Event*) override;
 
     SVGSMILElement* m_animation;
     SVGSMILElement::Condition* m_condition;
 };
 
 bool ConditionEventListener::operator==(const EventListener& listener)
 {
     if (const ConditionEventListener* conditionEventListener = ConditionEventListener::cast(&listener))
         return m_animation == conditionEventListener->m_animation && m_condition == conditionEventListener->m_condition;
     return false;
@@ skipping 1206 matching lines @@
     visitor->trace(m_targetElement);
     visitor->trace(m_timeContainer);
     visitor->trace(m_conditions);
     visitor->trace(m_syncBaseDependents);
 #endif
     SVGElement::trace(visitor);
     SVGTests::trace(visitor);
 }
 
 } // namespace blink