RefCounted types should not have public destructors, printing/ and ui/

ui/gfx/gl/gl_surface_cgl.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_GL_GL_SURFACE_CGL_H_
 #define UI_GFX_GL_GL_SURFACE_CGL_H_
 
 #include "ui/gfx/gl/gl_surface.h"
 #include "ui/gfx/size.h"
 
 namespace gfx {
 
 // Base class for CGL surfaces.
 class GLSurfaceCGL : public GLSurface {
  public:
   GLSurfaceCGL();
-  virtual ~GLSurfaceCGL();
 
   static bool InitializeOneOff();
   static void* GetPixelFormat();
 
+ protected:
+  virtual ~GLSurfaceCGL();
+
  private:
   DISALLOW_COPY_AND_ASSIGN(GLSurfaceCGL);
 };
 
 // A "no-op" surface. It is not required that a CGLContextObj have an
 // associated drawable (pbuffer or fullscreen context) in order to be
 // made current. Everywhere this surface type is used, we allocate an
 // FBO at the user level as the drawable of the associated context.
 class UI_EXPORT NoOpGLSurfaceCGL : public GLSurfaceCGL {
  public:
   explicit NoOpGLSurfaceCGL(const gfx::Size& size);
-  virtual ~NoOpGLSurfaceCGL();
 
   // Implement GLSurface.
   virtual bool Initialize() OVERRIDE;
   virtual void Destroy() OVERRIDE;
   virtual bool IsOffscreen() OVERRIDE;
   virtual bool SwapBuffers() OVERRIDE;
   virtual gfx::Size GetSize() OVERRIDE;
   virtual void* GetHandle() OVERRIDE;
 
+ protected:
+  virtual ~NoOpGLSurfaceCGL();
+
  private:
   gfx::Size size_;
 
   DISALLOW_COPY_AND_ASSIGN(NoOpGLSurfaceCGL);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_GL_GL_SURFACE_CGL_H_