no virtual destructor for point/size/rect

ui/gfx/rect_f.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_GFX_RECT_F_H_
 #define UI_GFX_RECT_F_H_
 #pragma once
 
 #include <string>
 
@@ skipping 12 matching lines @@
 
 // A floating version of gfx::Rect.
 class UI_EXPORT RectF : public RectBase<RectF, PointF, SizeF, InsetsF, float> {
  public:
   RectF();
   RectF(float width, float height);
   RectF(float x, float y, float width, float height);
   explicit RectF(const gfx::SizeF& size);
   RectF(const gfx::PointF& origin, const gfx::SizeF& size);
 
-  virtual ~RectF();
+  ~RectF();
 
   Rect ToRect() const;
 
   std::string ToString() const;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_RECT_H_