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

Source/core/animation/animatable/AnimatableColor.h

Index: Source/core/animation/animatable/AnimatableColor.h
diff --git a/Source/core/animation/animatable/AnimatableColor.h b/Source/core/animation/animatable/AnimatableColor.h
index 4e0bde474239da0ba6daf9ad04373ef82ed3b5c3..d501c524a6660c5d5a0a89a7647291c17cf13d48 100644
--- a/Source/core/animation/animatable/AnimatableColor.h
+++ b/Source/core/animation/animatable/AnimatableColor.h
@@ -65,7 +65,7 @@ public:
     DEFINE_INLINE_VIRTUAL_TRACE() { AnimatableValue::trace(visitor); }
 
 protected:
-    virtual PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const override;
+    PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const override;
 
 private:
     AnimatableColor(const AnimatableColorImpl& color, const AnimatableColorImpl& visitedLinkColor)
@@ -73,8 +73,8 @@ private:
         , m_visitedLinkColor(visitedLinkColor)
     {
     }
-    virtual AnimatableType type() const override { return TypeColor; }
-    virtual bool equalTo(const AnimatableValue*) const override;
+    AnimatableType type() const override { return TypeColor; }
+    bool equalTo(const AnimatableValue*) const override;
     const AnimatableColorImpl m_color;
     const AnimatableColorImpl m_visitedLinkColor;
 };