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

Source/core/layout/ClipPathOperation.h

 /*
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 56 matching lines @@
 public:
     static PassRefPtr<ReferenceClipPathOperation> create(const String& url, const AtomicString& fragment)
     {
         return adoptRef(new ReferenceClipPathOperation(url, fragment));
     }
 
     const String& url() const { return m_url; }
     const AtomicString& fragment() const { return m_fragment; }
 
 private:
-    virtual bool operator==(const ClipPathOperation& o) const override
+    bool operator==(const ClipPathOperation& o) const override
     {
         return isSameType(o) && m_url == static_cast<const ReferenceClipPathOperation&>(o).m_url;
     }
 
     ReferenceClipPathOperation(const String& url, const AtomicString& fragment)
         : ClipPathOperation(REFERENCE)
         , m_url(url)
         , m_fragment(fragment)
     {
     }
@@ skipping 18 matching lines @@
     {
         ASSERT(m_shape);
         m_path.clear();
         m_path = adoptPtr(new Path);
         m_shape->path(*m_path, boundingRect);
         m_path->setWindRule(windRule());
         return *m_path;
     }
 
 private:
-    virtual bool operator==(const ClipPathOperation&) const override;
+    bool operator==(const ClipPathOperation&) const override;
 
     ShapeClipPathOperation(PassRefPtr<BasicShape> shape)
         : ClipPathOperation(SHAPE)
         , m_shape(shape)
     {
     }
 
     RefPtr<BasicShape> m_shape;
     OwnPtr<Path> m_path;
 };
 
 DEFINE_TYPE_CASTS(ShapeClipPathOperation, ClipPathOperation, op, op->type() == ClipPathOperation::SHAPE, op.type() == ClipPathOperation::SHAPE);
 
 inline bool ShapeClipPathOperation::operator==(const ClipPathOperation& o) const
 {
     if (!isSameType(o))
         return false;
     BasicShape* otherShape = toShapeClipPathOperation(o).m_shape.get();
     if (!m_shape.get() || !otherShape)
         return static_cast<bool>(m_shape.get()) == static_cast<bool>(otherShape);
     return *m_shape == *otherShape;
 }
 
 }
 
 #endif // ClipPathOperation_h