Update to Chromium revision 40af916d (#303546).

- Standardize usage of virtual/override specifiers in CEF internals (see http://crbug.com/417463).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1903 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef_dll/ctocpp/menu_model_ctocpp.h

@@ -29,7 +29,6 @@ class CefMenuModelCToCpp
  public:
   explicit CefMenuModelCToCpp(cef_menu_model_t* str)
       : CefCToCpp<CefMenuModelCToCpp, CefMenuModel, cef_menu_model_t>(str) {}
-  virtual ~CefMenuModelCToCpp() {}
 
   // CefMenuModel methods
   virtual bool Clear() OVERRIDE;