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

Source/core/layout/svg/LayoutSVGResourceLinearGradient.h

Index: Source/core/layout/svg/LayoutSVGResourceLinearGradient.h
diff --git a/Source/core/layout/svg/LayoutSVGResourceLinearGradient.h b/Source/core/layout/svg/LayoutSVGResourceLinearGradient.h
index 13bed3294414741b0d648f9f9da2e123aa70ebbd..903f9dd3bf292ce5605c50269305218f13aa9bef 100644
--- a/Source/core/layout/svg/LayoutSVGResourceLinearGradient.h
+++ b/Source/core/layout/svg/LayoutSVGResourceLinearGradient.h
@@ -31,17 +31,17 @@ class SVGLinearGradientElement;
 class LayoutSVGResourceLinearGradient final : public LayoutSVGResourceGradient {
 public:
     explicit LayoutSVGResourceLinearGradient(SVGLinearGradientElement*);
-    virtual ~LayoutSVGResourceLinearGradient();
+    ~LayoutSVGResourceLinearGradient() override;
 
-    virtual const char* name() const override { return "LayoutSVGResourceLinearGradient"; }
+    const char* name() const override { return "LayoutSVGResourceLinearGradient"; }
 
     static const LayoutSVGResourceType s_resourceType = LinearGradientResourceType;
-    virtual LayoutSVGResourceType resourceType() const override { return s_resourceType; }
+    LayoutSVGResourceType resourceType() const override { return s_resourceType; }
 
-    virtual SVGUnitTypes::SVGUnitType gradientUnits() const override { return attributes().gradientUnits(); }
-    virtual void calculateGradientTransform(AffineTransform& transform) override { transform = attributes().gradientTransform(); }
-    virtual bool collectGradientAttributes(SVGGradientElement*) override;
-    virtual void buildGradient(GradientData*) const override;
+    SVGUnitTypes::SVGUnitType gradientUnits() const override { return attributes().gradientUnits(); }
+    void calculateGradientTransform(AffineTransform& transform) override { transform = attributes().gradientTransform(); }
+    bool collectGradientAttributes(SVGGradientElement*) override;
+    void buildGradient(GradientData*) const override;
 
     FloatPoint startPoint(const LinearGradientAttributes&) const;
     FloatPoint endPoint(const LinearGradientAttributes&) const;