Fix virtual/override/final usage in Source/core/layout/.

Source/core/layout/LayoutIFrame.h

Index: Source/core/layout/LayoutIFrame.h
diff --git a/Source/core/layout/LayoutIFrame.h b/Source/core/layout/LayoutIFrame.h
index 542c79afa2f0d08845aa20d3948ede94711660be..8945bd634462375e39a664ac0318999c91c2e442 100644
--- a/Source/core/layout/LayoutIFrame.h
+++ b/Source/core/layout/LayoutIFrame.h
@@ -34,17 +34,17 @@ class LayoutIFrame final : public LayoutPart {
 public:
     explicit LayoutIFrame(Element*);
 
-    virtual const char* name() const override { return "LayoutIFrame"; }
+    const char* name() const override { return "LayoutIFrame"; }
 
 private:
-    virtual bool shouldComputeSizeAsReplaced() const override;
-    virtual bool isInlineBlockOrInlineTable() const override;
+    bool shouldComputeSizeAsReplaced() const override;
+    bool isInlineBlockOrInlineTable() const override;
 
-    virtual void layout() override;
+    void layout() override;
 
-    virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectLayoutIFrame || LayoutPart::isOfType(type); }
+    bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectLayoutIFrame || LayoutPart::isOfType(type); }
 
-    virtual DeprecatedPaintLayerType layerTypeRequired() const override;
+    DeprecatedPaintLayerType layerTypeRequired() const override;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutIFrame, isLayoutIFrame());