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

Source/core/animation/KeyframeEffectModel.h

Index: Source/core/animation/KeyframeEffectModel.h
diff --git a/Source/core/animation/KeyframeEffectModel.h b/Source/core/animation/KeyframeEffectModel.h
index a4bf342c8813057b020ae1e7c8c2de9d44106b79..8dc00c303c9a98f0957f8d13d0e99319281a6def 100644
--- a/Source/core/animation/KeyframeEffectModel.h
+++ b/Source/core/animation/KeyframeEffectModel.h
@@ -88,9 +88,9 @@ public:
     }
 
     // EffectModel implementation.
-    virtual void sample(int iteration, double fraction, double iterationDuration, OwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>>&) const override;
+    void sample(int iteration, double fraction, double iterationDuration, OwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>>&) const override;
 
-    virtual bool isKeyframeEffectModel() const override { return true; }
+    bool isKeyframeEffectModel() const override { return true; }
 
     virtual bool isAnimatableValueKeyframeEffectModel() const { return false; }
     virtual bool isStringKeyframeEffectModel() const { return false; }
@@ -119,7 +119,7 @@ public:
         return m_keyframeGroups->contains(property);
     }
 
-    virtual bool isTransformRelatedEffect() const override;
+    bool isTransformRelatedEffect() const override;
 
 protected:
     KeyframeEffectModelBase(PassRefPtrWillBeRawPtr<TimingFunction> neutralKeyframeEasing)