third_party/protobuf: Update to HEAD (83d681ee2c)

third_party/protobuf/src/google/protobuf/stubs/type_traits.h

 // Copyright (c) 2006, Google Inc.
 // 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
@@ skipping 121 matching lines @@
 template<> struct is_integral<__wchar_t> : true_type { };
 #else
 template<> struct is_integral<wchar_t> : true_type { };
 #endif
 template<> struct is_integral<short> : true_type { };
 template<> struct is_integral<unsigned short> : true_type { };
 template<> struct is_integral<int> : true_type { };
 template<> struct is_integral<unsigned int> : true_type { };
 template<> struct is_integral<long> : true_type { };
 template<> struct is_integral<unsigned long> : true_type { };
-#ifdef HAVE_LONG_LONG
+#if defined(HAVE_LONG_LONG) || defined(_MSC_VER)
 template<> struct is_integral<long long> : true_type { };
 template<> struct is_integral<unsigned long long> : true_type { };
 #endif
 template <class T> struct is_integral<const T> : is_integral<T> { };
 template <class T> struct is_integral<volatile T> : is_integral<T> { };
 template <class T> struct is_integral<const volatile T> : is_integral<T> { };
 
 // is_floating_point is false except for the built-in floating-point types.
 // A cv-qualified type is integral if and only if the underlying type is.
 template <class T> struct is_floating_point : false_type { };
@@ skipping 202 matching lines @@
     : integral_constant<bool,
                         type_traits_internal::ConvertHelper<From, To>::value> {
 };
 #endif
 
 }  // namespace internal
 }  // namespace protobuf
 }  // namespace google
 
 #endif  // GOOGLE_PROTOBUF_TYPE_TRAITS_H_