Fix virtual/override/final usage in Source/platform/.

Source/platform/graphics/paint/Transform3DDisplayItem.h

Index: Source/platform/graphics/paint/Transform3DDisplayItem.h
diff --git a/Source/platform/graphics/paint/Transform3DDisplayItem.h b/Source/platform/graphics/paint/Transform3DDisplayItem.h
index 9015a8a2276377814d7e99b48f67e8987b470464..5dec83d754b75f82978042e863e62d96a12b72a5 100644
--- a/Source/platform/graphics/paint/Transform3DDisplayItem.h
+++ b/Source/platform/graphics/paint/Transform3DDisplayItem.h
@@ -21,8 +21,8 @@ public:
         ASSERT(DisplayItem::isTransform3DType(type));
     }
 
-    virtual void replay(GraphicsContext&) override;
-    virtual void appendToWebDisplayItemList(WebDisplayItemList*) const override;
+    void replay(GraphicsContext&) override;
+    void appendToWebDisplayItemList(WebDisplayItemList*) const override;
 
     const TransformationMatrix& transform() const { return m_transform; }
 
@@ -38,12 +38,12 @@ public:
         ASSERT(DisplayItem::isEndTransform3DType(type));
     }
 
-    virtual void replay(GraphicsContext&) override;
-    virtual void appendToWebDisplayItemList(WebDisplayItemList*) const override;
+    void replay(GraphicsContext&) override;
+    void appendToWebDisplayItemList(WebDisplayItemList*) const override;
 
 private:
 #if ENABLE(ASSERT)
-    virtual bool isEndAndPairedWith(DisplayItem::Type otherType) const override final
+    bool isEndAndPairedWith(DisplayItem::Type otherType) const final
     {
         return DisplayItem::transform3DTypeToEndTransform3DType(otherType) == type();
     }