Fix virtual/override/final usage in Source/core/{animation,css,style}/.

Source/core/animation/AnimationEffectTest.cpp

Index: Source/core/animation/AnimationEffectTest.cpp
diff --git a/Source/core/animation/AnimationEffectTest.cpp b/Source/core/animation/AnimationEffectTest.cpp
index 2c8d747a50ec93cdf424920196513a925da20cee..2e67b556379dc1649272d7a0e9648d854b45319e 100644
--- a/Source/core/animation/AnimationEffectTest.cpp
+++ b/Source/core/animation/AnimationEffectTest.cpp
@@ -38,12 +38,12 @@ namespace blink {
 
 class TestAnimationEffectEventDelegate : public AnimationEffect::EventDelegate {
 public:
-    virtual void onEventCondition(const AnimationEffect& animationNode) override
+    void onEventCondition(const AnimationEffect& animationNode) override
     {
         m_eventTriggered = true;
 
     }
-    virtual bool requiresIterationEvents(const AnimationEffect& animationNode) override
+    bool requiresIterationEvents(const AnimationEffect& animationNode) override
     {
         return true;
     }
@@ -75,10 +75,10 @@ public:
         AnimationEffect::updateInheritedTime(time, reason);
     }
 
-    virtual void updateChildrenAndEffects() const override { }
+    void updateChildrenAndEffects() const override { }
     void willDetach() { }
     TestAnimationEffectEventDelegate* eventDelegate() { return m_eventDelegate.get(); }
-    virtual double calculateTimeToEffectChange(bool forwards, double localTime, double timeToNextIteration) const override
+    double calculateTimeToEffectChange(bool forwards, double localTime, double timeToNextIteration) const override
     {
         m_localTime = localTime;
         m_timeToNextIteration = timeToNextIteration;