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

Source/core/animation/InterpolableValueTest.cpp

 // Copyright 2014 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.
 
 #include "config.h"
 #include "core/animation/InterpolableValue.h"
 
 #include "core/animation/Interpolation.h"
 #include "core/animation/PropertyHandle.h"
 
 #include <gtest/gtest.h>
 
 namespace blink {
 
 namespace {
 
 class SampleInterpolation : public Interpolation {
 public:
     static PassRefPtrWillBeRawPtr<Interpolation> create(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end)
     {
         return adoptRefWillBeNoop(new SampleInterpolation(start, end));
     }
 
-    virtual PropertyHandle property() const override
+    PropertyHandle property() const override
     {
         return PropertyHandle(CSSPropertyBackgroundColor);
     }
 private:
     SampleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end)
         : Interpolation(start, end)
     {
     }
 };
 
@@ skipping 234 matching lines @@
     listB->set(1, InterpolableNumber::create(-10));
     listB->set(2, InterpolableNumber::create(9));
 
     OwnPtrWillBeRawPtr<InterpolableList> resultB = multiplyList(0, listB.release());
     EXPECT_FLOAT_EQ(0, toInterpolableNumber(resultB->get(0))->value());
     EXPECT_FLOAT_EQ(0, toInterpolableNumber(resultB->get(1))->value());
     EXPECT_FLOAT_EQ(0, toInterpolableNumber(resultB->get(2))->value());
 }
 
 }