no virtual destructor for point/size/rect

ui/gfx/size.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_SIZE_H_
 #define UI_GFX_SIZE_H_
 #pragma once
 
 #include <string>
 
@@ skipping 11 matching lines @@
 
 // A size has width and height values.
 class UI_EXPORT Size : public SizeBase<Size, int> {
  public:
   Size();
   Size(int width, int height);
 #if defined(OS_MACOSX)
   explicit Size(const CGSize& s);
 #endif
 
-  virtual ~Size();
+  ~Size();
 
 #if defined(OS_MACOSX)
   Size& operator=(const CGSize& s);
 #endif
 
 #if defined(OS_WIN)
   SIZE ToSIZE() const;
 #elif defined(OS_MACOSX)
   CGSize ToCGSize() const;
 #endif
 
   std::string ToString() const;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_SIZE_H_