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

Source/core/animation/LegacyStyleInterpolation.h

Index: Source/core/animation/LegacyStyleInterpolation.h
diff --git a/Source/core/animation/LegacyStyleInterpolation.h b/Source/core/animation/LegacyStyleInterpolation.h
index 276c9e4d47379533f757dc209b8dda5613e3ad1a..aceb97d6b844261d3dcc71dbf68058b6e8102aa7 100644
--- a/Source/core/animation/LegacyStyleInterpolation.h
+++ b/Source/core/animation/LegacyStyleInterpolation.h
@@ -17,12 +17,12 @@ public:
         return adoptRefWillBeNoop(new LegacyStyleInterpolation(InterpolableAnimatableValue::create(start), InterpolableAnimatableValue::create(end), id));
     }
 
-    virtual void apply(StyleResolverState& state) const override
+    void apply(StyleResolverState& state) const override
     {
         AnimatedStyleBuilder::applyProperty(m_id, state, currentValue().get());
     }
 
-    virtual bool isLegacyStyleInterpolation() const override final { return true; }
+    bool isLegacyStyleInterpolation() const final { return true; }
     PassRefPtrWillBeRawPtr<AnimatableValue> currentValue() const
     {
         return toInterpolableAnimatableValue(m_cachedValue.get())->value();