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

Source/core/paint/LayerClipRecorderTest.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/LayerClipRecorder.h"
 
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/compositing/DeprecatedPaintLayerCompositor.h"
@@ skipping 11 matching lines @@
 public:
     LayerClipRecorderTest()
         : m_layoutView(nullptr)
         , m_originalSlimmingPaintEnabled(RuntimeEnabledFeatures::slimmingPaintEnabled()) { }
 
 protected:
     LayoutView& layoutView() { return *m_layoutView; }
     DisplayItemList& rootDisplayItemList() { return *layoutView().layer()->graphicsLayerBacking()->displayItemList(); }
 
 private:
-    virtual void SetUp() override
+    void SetUp() override
     {
         RuntimeEnabledFeatures::setSlimmingPaintEnabled(true);
 
         RenderingTest::SetUp();
         enableCompositing();
 
         m_layoutView = document().view()->layoutView();
         ASSERT_TRUE(m_layoutView);
     }
-    virtual void TearDown() override
+    void TearDown() override
     {
         RuntimeEnabledFeatures::setSlimmingPaintEnabled(m_originalSlimmingPaintEnabled);
     }
 
     LayoutView* m_layoutView;
     bool m_originalSlimmingPaintEnabled;
 };
 
 void drawEmptyClip(GraphicsContext& context, LayoutView& layoutView, PaintPhase phase, const FloatRect& bound)
 {
@@ skipping 33 matching lines @@
     FloatRect bound = layoutView().viewRect();
     EXPECT_EQ((size_t)0, rootDisplayItemList().displayItems().size());
 
     drawEmptyClip(context, layoutView(), PaintPhaseForeground, bound);
     rootDisplayItemList().commitNewDisplayItems();
     EXPECT_EQ((size_t)0, rootDisplayItemList().displayItems().size());
 }
 
 }
 }