Fix virtual/override/final usage in the rest of Source/core/.

Source/core/paint/NinePieceImageGridTest.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/paint/NinePieceImageGrid.h"
 
 #include "core/css/CSSGradientValue.h"
 #include "core/layout/LayoutTestHelper.h"
 #include "core/style/ComputedStyle.h"
 #include "core/style/NinePieceImage.h"
 #include "core/style/StyleGeneratedImage.h"
 #include <gtest/gtest.h>
 
 namespace blink {
 namespace {
 
 class NinePieceImageGridTest : public RenderingTest {
 public:
     NinePieceImageGridTest() { }
 
     PassRefPtr<StyleImage> generatedImage()
     {
         RefPtrWillBeRawPtr<CSSLinearGradientValue> gradient = CSSLinearGradientValue::create(Repeating);
         RefPtr<StyleGeneratedImage> image = StyleGeneratedImage::create(gradient.get());
         return image;
     }
 
 private:
-    virtual void SetUp() override
+    void SetUp() override
     {
         RenderingTest::SetUp();
     }
 };
 
 TEST_F(NinePieceImageGridTest, NinePieceImagePainting_NoDrawables)
 {
     NinePieceImage ninePiece;
     ninePiece.setImage(generatedImage());
 
@@ skipping 220 matching lines @@
             EXPECT_FLOAT_EQ(testCase.pieces[piece].tileScaleHorizontal, drawInfo.tileScale.width());
             EXPECT_FLOAT_EQ(testCase.pieces[piece].tileScaleVertical, drawInfo.tileScale.height());
             EXPECT_EQ(testCase.pieces[piece].horizontalRule, drawInfo.tileRule.horizontal);
             EXPECT_EQ(testCase.pieces[piece].verticalRule, drawInfo.tileRule.vertical);
         }
     }
 }
 
 } // namespace
 } // namespace blink