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

Source/core/animation/NumberSVGInterpolation.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NumberSVGInterpolation_h
 #define NumberSVGInterpolation_h
 
 #include "core/animation/SVGInterpolation.h"
 #include "core/svg/SVGNumber.h"
 #include "core/svg/SVGNumberList.h"
@@ skipping 13 matching lines @@
     static PassRefPtrWillBeRawPtr<NumberSVGInterpolation> create(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute, SVGNumberNegativeValuesMode negativeValuesMode)
     {
         return adoptRefWillBeNoop(new NumberSVGInterpolation(toInterpolableValue(start), toInterpolableValue(end), attribute, negativeValuesMode));
     }
 
     static bool canCreateFrom(SVGPropertyBase* value)
     {
         return true;
     }
 
-    virtual PassRefPtrWillBeRawPtr<SVGPropertyBase> interpolatedValue(SVGElement&) const override final
+    PassRefPtrWillBeRawPtr<SVGPropertyBase> interpolatedValue(SVGElement&) const final
     {
         return fromInterpolableValue(*m_cachedValue, m_negativeValuesMode);
     }
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         SVGInterpolation::trace(visitor);
     }
 
     static PassOwnPtrWillBeRawPtr<InterpolableNumber> toInterpolableValue(SVGPropertyBase* value)
     {
         return InterpolableNumber::create(toSVGNumber(value)->value());
     }
 
     static PassRefPtrWillBeRawPtr<SVGNumber> fromInterpolableValue(const InterpolableValue&, SVGNumberNegativeValuesMode = AllowNegativeNumbers);
 
 private:
     NumberSVGInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute, SVGNumberNegativeValuesMode negativeValuesMode)
         : SVGInterpolation(start, end, attribute)
         , m_negativeValuesMode(negativeValuesMode)
     {
     }
 
     const SVGNumberNegativeValuesMode m_negativeValuesMode;
 };
 
 }
 
 #endif // NumberSVGInterpolation_h