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

Source/core/page/scrolling/ScrollingConstraints.h

 /*
  * Copyright (C) 2012 Apple Inc. 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 86 matching lines @@
     {
         return m_alignmentOffset == other.m_alignmentOffset
             && m_anchorEdges == other.m_anchorEdges
             && m_viewportRectAtLastLayout == other.m_viewportRectAtLastLayout
             && m_layerPositionAtLastLayout == other.m_layerPositionAtLastLayout;
     }
 
     bool operator!=(const FixedPositionViewportConstraints& other) const { return !(*this == other); }
 
 private:
-    virtual ConstraintType constraintType() const override { return FixedPositionConstaint; }
+    ConstraintType constraintType() const override { return FixedPositionConstaint; }
 
     FloatRect m_viewportRectAtLastLayout;
     FloatPoint m_layerPositionAtLastLayout;
 };
 
 } // namespace blink
 
 #endif // ScrollingConstraints_h