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/completion_callback_ctocpp.h

@@ -31,10 +31,9 @@ class CefCompletionCallbackCToCpp
   explicit CefCompletionCallbackCToCpp(cef_completion_callback_t* str)
       : CefCToCpp<CefCompletionCallbackCToCpp, CefCompletionCallback,
           cef_completion_callback_t>(str) {}
-  virtual ~CefCompletionCallbackCToCpp() {}
 
   // CefCompletionCallback methods
-  virtual void OnComplete() OVERRIDE;
+  void OnComplete() override;
 };
 
 #endif  // BUILDING_CEF_SHARED