Visual Studio 2012 and later support the C++11 final keyword.

src/globals.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 342 matching lines @@
 #  endif
 # else
 // '__final' is a non-C++11 GCC synonym for 'final', per GCC r176655.
 #  if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)
 #   define V8_HAVE_GXX_FINAL
 #  endif
 # endif
 
 #elif defined(_MSC_VER)
 
+// Override control was added with Visual Studio 2005.
 # if _MSC_VER >= 1400
+#  if _MSC_VER >= 1700
+#   define V8_HAVE_CXX11_FINAL
+#  else
+// Visual Studio 2010 and earlier spell "final" as "sealed".
+#   define V8_HAVE_MSVC_SEALED
+#  endif
 #  define V8_HAVE_CXX11_OVERRIDE
-// MSVC currently spells "final" as "sealed".
-#  define V8_HAVE_MSVC_SEALED
 # endif
 
 #endif
 
 
 #if __cplusplus >= 201103L
 #define DISALLOW_BY_DELETE = delete
 #else
 #define DISALLOW_BY_DELETE
 #endif
@@ skipping 132 matching lines @@
 // the backend, so both modes are represented by the kStrictMode value.
 enum StrictModeFlag {
   kNonStrictMode,
   kStrictMode
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_GLOBALS_H_